Added image scrollbar to viewports (LT-20)

Added image scrollbar to viewports (LT-20)

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

@@ -21,5 +21,6 @@
             <div>{{imageDimensions}}</div>
             <div>{{seriesDescription}}</div>
         </div>
+        {{>imageControls}}
     </div>
 </template>

Packages/viewerbase/client/components/viewer/viewportOverlay/viewportOverlay.styl

@@ -3,7 +3,7 @@
   color: #e4ad00
   line-height: 18px
   display: none // Shown when an image is loaded
-  
+
   .dicomTag
     pointer-events: none // Necessary for drag/drop through to cornerstone element below
     position: absolute