Bug 450097 - focusCellChanged method in CursorCellHighlighter causes a
NPE

Change-Id: I6f8f320c4b89f60eda20f7486094948e228e2793
Signed-off-by: Simon Scholz <simon.scholz@vogella.com>
Bug 450019 - Cleanup org.eclipse.e4.ui.dialogs.filteredtree.FilteredTree
implementation

Change-Id: I4ac91e35f4c65d77f79d9faa4edfa554bd7a8a12
Signed-off-by: Simon Scholz <simon.scholz@vogella.com>