Description of problem: It would be nice if an user had the possibility to collapse folders in the simulation results which would make the view port a bit smaller in size and he would not have to scroll from top to bottom (and vice versa). Currently the folders in the simulation results cannot be collapsed. Version-Release number of selected component (if applicable): 6.1.0 ER6 Steps to Reproduce: 1. create a simple process (Start -> Manual Task -> End) 2. run simulation 3. go to the simulation Results tab 4. collapse any folder (Process, Process Elements, Paths) Actual results: The IE console shows this error: "Unable to get property 'ui' of undefined or null reference" whenever I try to close an expanded tree item. Based on BZ1049506, this is a problem in Ext library (v2.0.2). Newer versions of this library are not an open source. Expected results: An user can collapse folders in the simulation results tree. Additional info: Maybe the own implementation of this tree may help.