fix(column-resizer): Disable text selection while resizing columns.

Used suggestion provided by @urilgb413.

fix #6272

Author: Portugal, Marcelo

src/features/resize-columns/less/column-resizer.less

@@ -35,6 +35,12 @@
 .ui-grid {
   &.column-resizing {
     cursor: col-resize;
+    -webkit-touch-callout: none;
+    -webkit-user-select: none;
+    -khtml-user-select: none;
+    -moz-user-select: none;
+    -ms-user-select: none;
+    user-select: none;
   }
 }