memmory safe AbstractManager

AbstractManager.js

//Dependency: https://gist.github.com/MattiasFestin/e5e92d5ae5e2b4bf89c3
Ext.override('Ext.AbstractManager', {
    constructor: function(config) {
        Ext.apply(this, config || {});

        /**
         * @property {Ext.util.HashMap} all
         * Contains all of the items currently managed
         */
        if (typeof window.WeakMap === 'function') {
            this.all = new Ext.util.WeakHashMap();
        } else {
            //Fallback
            this.all = new Ext.util.HashMap();
        }

        this.types = {};
    }
});