Elastic: Fix scrollbar issue in jQuery-UI dialogs

Bootstrap's box-sizing:border-box on everything does not work nice with jQuery-UI.

skins/elastic/styles/widgets/jqueryui.less

@@ -96,9 +96,6 @@
     }
 
     .ui-dialog-content {
-        // fixes resize issue e.g. in qr-code dialog
-        box-sizing: initial;
-
         & > .popupmenu {
             display: block !important;
         }
@@ -157,6 +154,12 @@
     }
 }
 
+// Fix scrollbar/resize issue e.g. in qr-code dialog
+.ui-dialog,
+.ui-dialog-content {
+    box-sizing: initial;
+}
+
 // Overwriting this icon generally prevents from loading bigger images sprite from jQuery-UI
 .ui-widget-content .ui-icon.ui-resizable-se {
     background: @icon-resize-corner;