Add support for configurable filter "property"

Ext.bugfix.GridFilterBase.js

/**
 * Add support for configurable filter "property"
 */
Ext.define('Ext.bugfix.GridFilterBase', {
  override: 'Ext.grid.filters.filter.Base',

  config: {
    /**
     * @cfg {String} property
     * The property name to use when creating a filter
     */
    property: null
  },

  createFilter: function (config, key) {
    config.id = this.getBaseIdPrefix();

    if (!config.property) {
      if (this.property) {
        config.property = this.property;
      } else {
        config.property = this.column.dataIndex;
      }
    }

    if (!config.root) {
      config.root = this.defaultRoot;
    }

    if (key) {
      config.id += '-' + key;
    }

    return new Ext.util.Filter(config);
  }
});