move dialog fix

EDUCATOR-292

cms/static/js/views/modals/move_xblock_modal.js

@@ -89,6 +89,10 @@ function($, Backbone, _, gettext, BaseView, XBlockViewUtils, MoveXBlockUtils, Ht
             Feedback.prototype.outFocus.apply(this);
         },
 
+        resize: function() {
+            // Do Nothing. Overridden to use our own styling instead of one provided by base modal
+        },
+
         focusModal: function() {
             Feedback.prototype.inFocus.apply(this, [this.options.modalWindowClass]);
             $(this.options.modalWindowClass).focus();

cms/static/sass/elements/_modal-window.scss

@@ -288,8 +288,11 @@
   // ------------------------
 
   // Move XBlock Modal
-  .modal-window.move-modal {
-    top: 10% !important;
+  .move-modal {
+    position: fixed;
+    left: 50%;
+    top: 50%;
+    @include transform(translate(-50%,-50%));
   }
 
   .move-xblock-modal {