rem: this._manager.setSelectedItem(propValue); 
add: if (propValue) { this._manager.setSelectedItem(propValue); } else { this._manager.deselectAll(); } 
context: qx.Proto._modifySelected = function(propValue, propOldValue, propData){  this._fromSelected = true;  // only do this if we called setSelected seperatly  // and not from the property "value".  if (!this._fromValue) {    this.setValue(propValue ? propValue.getLabel() : qx.constant.Core.EMPTY);  }  // reset manager cache  this._manager.setLeadItem(propValue);  this._manager.setAnchorItem(propValue);  // sync to manager  this._manager.setSelectedItem(propValue);  // reset hint  delete this._fromSelected;  return true;}
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/bb25075310d5fdda33f0594ee875fda523ac741f/ComboBox.js/buggy/qooxdoo/frontend/framework/source/class/qx/ui/form/ComboBox.js