Updating design of OHIF Viewer using (OHIF-49)

Packages/viewerbase/client/components/viewer/simpleToolbarButton/simpleToolbarButton.html

@@ -1,5 +1,11 @@
 <template name="simpleToolbarButton">
-    <button id="{{id}}" type="button" class="{{classes}} btn btn-sm btn-default" data-container="body" data-toggle="tooltip" data-placement="bottom" title="{{title}}">
+    <button id="{{id}}"
+    		type="button"
+    		class="{{classes}} btn btn-sm {{activeClass}}"
+    		data-container="body"
+    		data-toggle="tooltip"
+    		data-placement="bottom"
+    		title="{{title}}">
         <span class="{{iconClasses}}"></span>
     </button>
 </template>