Fixed #10515, Problem with column filter sorting.
Improved Core.UI.TreeSelection.RestoreDynamicFieldTreeView to show the delete filter option on top.
Tidied the code.
Updated the changes file.
Code cleanup.
Fixed bug# 10670 - It is possible to start the scheduler more than once.
Fixed line indentation.
Merge remote-tracking branch 'upstream/rel-3_3' into rel-3_3