[Frontend] New symbols font and CSS adjustments

WTD-980
WTD-396
Changed glyph for stacked plots;
Normalized button line-heights and size of required symbol;
Updated symbol art in symbols font;
Restored mistakenly removed "menu" gesture to grid-item;

platform/commonUI/browse/res/templates/create/create-button.html

@@ -21,7 +21,7 @@
 -->
 <div class="menu-element wrapper" ng-controller="ClickAwayController as createController">
     <div class="btn btn-menu create-btn major" ng-click="createController.toggle()">
-        <span class='ui-symbol' href=''>+</span> Create
+	    Create
     </div>
     <div class="menu dropdown super-menu" ng-show="createController.isActive()">
         <mct-representation mct-object="domainObject" key="'create-menu'">

platform/commonUI/browse/res/templates/create/create-menu.html

@@ -24,7 +24,7 @@
         <ul>
 
             <li ng-repeat="createAction in createActions">
-                <a href=''
+                <a
                    ng-click="createAction.perform()"
                    ng-mouseover="representation.activeMetadata = createAction.getMetadata()"
                    ng-mouseleave="representation.activeMetadata = undefined">