Bold style of 'select all' item also in the crowd

less/bootstrap-multiselect.less

@@ -3,30 +3,34 @@
   list-style-type: none;
   margin: 0;
   padding: 0;
-  
+
   input[type="text"] {
     width: 70%;
   }
-  
+
   .input-prepend {
     padding: 3px;
   }
-  
+
   > li {
     padding: 0;
-    
+
+    > a.multiselect-all label {
+      font-weight: bold;
+    }
+
     > label {
       margin: 0;
       padding: 3px 20px 3px 20px;
       height: 100%;
       cursor: pointer;
-      
+
       &.multiselect-header {
         margin: 0;
         padding: 3px 20px 3px 20px;
         height: 100%;
       }
-      
+
       > input[type="checkbox"] {
         margin-bottom:5px;
       }