Do not rerender the selection menu on show

Signed-off-by: Julius Härtl <jus@bitgrid.net>

apps/files/js/filemultiselectmenu.js

@@ -36,7 +36,6 @@
 		 */
 		show: function(context) {
 			this._context = context;
-			this.render();
 			this.$el.removeClass('hidden');
 			if (window.innerWidth < 480) {
 				this.$el.removeClass('menu-center').addClass('menu-right');