fix select2 input height

app/assets/stylesheets/content/_select2.scss

@@ -80,12 +80,6 @@
   text-overflow: ellipsis;
 }
 
-
-/* Fix search input in IE8 - input was to high */
-.select2-search input {
-  min-height: 0\9;
-}
-
 .controller-work_packages.action-index .select2-drop:not(.project-search-results) .select2-results .select2-result-selectable {
   color: #000;
 }
@@ -122,6 +116,7 @@ $se2-theme-selectable-color: #f8f8f8;
 $se2-theme-selectable-color-highlighted: $drop-down-selected-bg-color;
 
 $se2-element-height: 33px;
+$se2-input-height: 34px;
 $se2-line-height: 30px;
 $se2-button-width: 28px;
 $se2-arrow-button-width: 18px;
@@ -200,3 +195,7 @@ $se2-width: 100%;
     }
   }
 }
+
+.select2-input {
+  height: rem-calc($se2-input-height) !important;
+}