Merge branch 'release/3-0-5' into release/3.0.7

app/assets/stylesheets/backlogs/master_backlog.css.erb

@@ -152,31 +152,30 @@ See doc/COPYRIGHT.rdoc for more details.
   width: 28px;
 }
 #rb #backlogs_container .backlog .header .toggler {
-  background-image: url("/assets/double_arrows_grey_white_sprite.png");
-  background-position: -4px -22px;
+  font-family: "openproject-icon-font";
   height: 30px;
   line-height: 31px;
   padding: 0;
   position: absolute;
   right: 0;
-  text-align: right;
   top: 0;
   width: 23px;
   cursor: pointer;
 }
 
-#rb #backlogs_container .backlog .header .toggler:hover {
-  background-position: -4px -155px;
-  cursor: pointer;
-  background-color:#D8D8D8;
+#rb #backlogs_container .backlog .header .toggler:before {
+  content: "\e0d4";
+  margin-left: 5px;
 }
 
-#rb #backlogs_container .backlog .header .toggler.closed {
-  background-position: -4px 3px;
+#rb #backlogs_container .backlog .header .toggler.closed:before {
+  content: "\e0d2";
+  margin-left: 5px;
 }
 
-#rb #backlogs_container .backlog .header .toggler.closed:hover {
-  background-position: -4px -115px;
+#rb #backlogs_container .backlog .header .toggler:hover {
+  cursor: pointer;
+  background-color:#D8D8D8;
 }
 
 #rb #backlogs_container .backlog .sprint {