Fix some minor UI issues on IE11. Fixes #4462

Includes some Jasmine test case fixes from Ganesh.

web/pgadmin/static/js/backgrid.pgadmin.js

@@ -206,6 +206,11 @@ define([
             if(cell && cell.$el.hasClass('edit-cell') &&
               !cell.$el.hasClass('privileges') || cell.$el.hasClass('delete-cell')) {
               model.trigger('backgrid:next', m, n, false);
+              if(cell.$el.hasClass('delete-cell')) {
+                setTimeout(function(){
+                  $(cell.$el).trigger('focus');
+                }, 50);
+              }
               break;
             } else if (renderable && editable) {
               cell.enterEditMode();

web/pgadmin/static/scss/_pgadmin.style.scss

@@ -741,6 +741,17 @@ table tr td {
   }
 }
 
+/* Specific to IE11 where we want to highlight the focus on grid buttons */
+@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
+  table tr td {
+    td.edit-cell:focus,
+    td.delete-cell:focus,
+    td.string-cell:focus {
+      border: 2px solid $input-focus-border-color !important;;
+    }
+  }
+}
+
 .privilege_label{
   font-size: 10px!important;
 }