message: allow context-menus/tooltips to work over modals
diff: @@ -16,7 +16,7 @@ limitations under the License.
  .mx_ContextualMenu_wrapper {
  position: fixed;
  - z-index: 2000;
  + z-index: 5000;
  }
  .mx_ContextualMenu_background {
  @@ -26,7 +26,7 @@ limitations under the License.
  width: 100%;
  height: 100%;
  opacity: 1.0;
  - z-index: 2000;
  + z-index: 5000;
  }
  .mx_ContextualMenu {
  @@ -37,7 +37,7 @@ limitations under the License.
  position: absolute;
  padding: 6px;
  font-size: 14px;
  - z-index: 2001;
  + z-index: 5001;
  }
  .mx_ContextualMenu.mx_ContextualMenu_right {
  