ContainerCss: Remove magic `:all:` correctly. Fixes #3446.

src/js/select2/compat/containerCss.js

@@ -22,7 +22,7 @@ define([
     containerCssAdapter = containerCssAdapter || _containerAdapter;
 
     if (containerCssClass.indexOf(':all:') !== -1) {
-      containerCssClass = containerCssClass.replace(':all', '');
+      containerCssClass = containerCssClass.replace(':all:', '');
 
       var _cssAdapter = containerCssAdapter;