scope new icons from icon font to top and project menu

otherwise we have some icons twice as long as we still use the old icons in the content area

app/assets/stylesheets/fonts/openproject_icon_font.css.sass

@@ -59,234 +59,236 @@
   content: attr(data-icon3)
   padding: 0px 8px 0px 0px
 
-[class^="icon-"]:before,
+#top-menu, #main-menu
-[class*=" icon-"]:before
+  [class^="icon-"]:before,
-  @include data-icon
+  [class*=" icon-"]:before
+    @include data-icon
 
-.icon-arrow-1-down:before
+#top-menu, #main-menu
-  content: "a"
+  .icon-arrow-1-down:before
+    content: "a"
 
-.icon-edit-pen-1:before
+  .icon-edit-pen-1:before
-  content: "b"
+    content: "b"
 
-.icon-copy:before
+  .icon-copy:before
-  content: "c"
+    content: "c"
 
-.icon-add:before
+  .icon-add:before
-  content: "d"
+    content: "d"
 
-.icon-content-14:before
+  .icon-content-14:before
-  content: "e"
+    content: "e"
 
-.icon-time:before
+  .icon-time:before
-  content: "f"
+    content: "f"
 
-.icon-unit:before
+  .icon-unit:before
-  content: "g"
+    content: "g"
 
-.icon-refresh-reload-1:before
+  .icon-refresh-reload-1:before
-  content: "h"
+    content: "h"
 
-.icon-lock-secure-1:before
+  .icon-lock-secure-1:before
-  content: "i"
+    content: "i"
 
-.icon-unlock:before
+  .icon-unlock:before
-  content: "j"
+    content: "j"
 
-.icon-check-1:before
+  .icon-check-1:before
-  content: "k"
+    content: "k"
 
-.icon-quote:before
+  .icon-quote:before
-  content: "l"
+    content: "l"
 
-.icon-letter-mail-1:before
+  .icon-letter-mail-1:before
-  content: "m"
+    content: "m"
 
-.icon-duplicate:before
+  .icon-duplicate:before
-  content: "n"
+    content: "n"
 
-.icon-open-folder:before
+  .icon-open-folder:before
-  content: "o"
+    content: "o"
 
-.icon-filled-folder-1:before
+  .icon-filled-folder-1:before
-  content: "p"
+    content: "p"
 
-.icon-text-document:before
+  .icon-text-document:before
-  content: "q"
+    content: "q"
 
-.icon-compressed-zip-file:before
+  .icon-compressed-zip-file:before
-  content: "r"
+    content: "r"
 
-.icon-document-file-1:before
+  .icon-document-file-1:before
-  content: "s"
+    content: "s"
 
-.icon-image-photo-file-1:before
+  .icon-image-photo-file-1:before
-  content: "t"
+    content: "t"
 
-.icon-movie-play-file-1:before
+  .icon-movie-play-file-1:before
-  content: "u"
+    content: "u"
 
-.icon-music-file-1:before
+  .icon-music-file-1:before
-  content: "v"
+    content: "v"
 
-.icon-stats:before
+  .icon-stats:before
-  content: "w"
+    content: "w"
 
-.icon-move:before
+  .icon-move:before
-  content: "x"
+    content: "x"
 
-.icon-priority:before
+  .icon-priority:before
-  content: "y"
+    content: "y"
 
-.icon-tracker:before
+  .icon-tracker:before
-  content: "z"
+    content: "z"
 
-.icon-status:before
+  .icon-status:before
-  content: "A"
+    content: "A"
 
-.icon-male-user-1:before
+  .icon-male-user-1:before
-  content: "B"
+    content: "B"
 
-.icon-budget:before
+  .icon-budget:before
-  content: "C"
+    content: "C"
 
-.icon-cancel:before
+  .icon-cancel:before
-  content: "D"
+    content: "D"
 
-.icon-feed-rss-2:before
+  .icon-feed-rss-2:before
-  content: "E"
+    content: "E"
 
-.icon-delete-trash-1:before
+  .icon-delete-trash-1:before
-  content: "F"
+    content: "F"
 
-.icon-eye-view-1:before
+  .icon-eye-view-1:before
-  content: "G"
+    content: "G"
 
-.icon-not-watch:before
+  .icon-not-watch:before
-  content: "H"
+    content: "H"
 
-.icon-close:before
+  .icon-close:before
-  content: "I"
+    content: "I"
 
-.icon-disc-floppy-font:before
+  .icon-disc-floppy-font:before
-  content: "J"
+    content: "J"
 
-.icon-calendar:before
+  .icon-calendar:before
-  content: "K"
+    content: "K"
 
-.icon-help:before
+  .icon-help:before
-  content: "L"
+    content: "L"
 
-.icon-version:before
+  .icon-version:before
-  content: "M"
+    content: "M"
 
-.icon-added:before
+  .icon-added:before
-  content: "N"
+    content: "N"
 
-.icon-arrow-left-right:before
+  .icon-arrow-left-right:before
-  content: "O"
+    content: "O"
 
-.icon-arrow-left-right:before
+  .icon-arrow-left-right:before
-  content: "O"
+    content: "O"
 
-.icon-minus-zoom:before
+  .icon-minus-zoom:before
-  content: "P"
+    content: "P"
 
-.icon-minus-zoom:before
+  .icon-minus-zoom:before
-  content: "P"
+    content: "P"
 
-.icon-plus-zoom:before
+  .icon-plus-zoom:before
-  content: "Q"
+    content: "Q"
 
-.icon-outline:before
+  .icon-outline:before
-  content: "R"
+    content: "R"
 
-.icon-rename:before
+  .icon-rename:before
-  content: "S"
+    content: "S"
 
-.icon-gears-setting:before
+  .icon-gears-setting:before
-  content: "T"
+    content: "T"
 
-.icon-ticket:before
+  .icon-ticket:before
-  content: "U"
+    content: "U"
 
-.icon-ticket-edit:before
+  .icon-ticket-edit:before
-  content: "V"
+    content: "V"
 
-.icon-ticket-checked:before
+  .icon-ticket-checked:before
-  content: "W"
+    content: "W"
 
-.icon-ticket-note:before
+  .icon-ticket-note:before
-  content: "X"
+    content: "X"
 
-.icon-wiki-edit:before
+  .icon-wiki-edit:before
-  content: "Y"
+    content: "Y"
 
-.icon-cup-2:before
+  .icon-cup-2:before
-  content: "Z"
+    content: "Z"
 
-.icon-new-planning-element:before
+  .icon-new-planning-element:before
-  content: "0"
+    content: "0"
 
-.icon-changeset:before
+  .icon-changeset:before
-  content: "1"
+    content: "1"
 
-.icon-news:before
+  .icon-news:before
-  content: "2"
+    content: "2"
 
-.icon-projects:before
+  .icon-projects:before
-  content: "3"
+    content: "3"
 
-.icon-link:before
+  .icon-link:before
-  content: "4"
+    content: "4"
 
-.icon-bookmark-star-favorite:before
+  .icon-bookmark-star-favorite:before
-  content: "5"
+    content: "5"
 
-.icon-excel:before
+  .icon-excel:before
-  content: "6"
+    content: "6"
 
-.icon-content-44:before
+  .icon-content-44:before
-  content: "7"
+    content: "7"
 
-.icon-publish:before
+  .icon-publish:before
-  content: "8"
+    content: "8"
 
-.icon-double-arrow-left:before
+  .icon-double-arrow-left:before
-  content: "9"
+    content: "9"
 
-.icon-double-arrow-right:before
+  .icon-double-arrow-right:before
-  content: "!"
+    content: "!"
 
-.icon-warning:before
+  .icon-warning:before
-  content: "#"
+    content: "#"
 
-.icon-warning:before
+  .icon-warning:before
-  content: "#"
+    content: "#"
 
-.icon-chart-graph-file-1:before
+  .icon-chart-graph-file-1:before
-  content: "$"
+    content: "$"
 
-.icon-lightbulb-shine:before
+  .icon-lightbulb-shine:before
-  content: "%"
+    content: "%"
 
-.icon-group:before
+  .icon-group:before
-  content: "&"
+    content: "&"
 
-.icon-gift:before
+  .icon-gift:before
-  content: "'"
+    content: "'"
 
-.icon-home-1:before
+  .icon-home-1:before
-  content: "("
+    content: "("
 
-.icon-clip-paper-1:before
+  .icon-clip-paper-1:before
-  content: ")"
+    content: ")"
 
-.icon-issue-assignedtome:before
+  .icon-issue-assignedtome:before
-  content: "*"
+    content: "*"
 
-.icon-issue-reportedbyme:before
+  .icon-issue-reportedbyme:before
-  content: "+"
+    content: "+"
 
-.icon-issue-watched:before
+  .icon-issue-watched:before
-  content: ","
+    content: ","