Used new column editing support for investment plan view
Used new column editing support for consumer price index
Used new column editing support for security prices table
Used new column editing support for import dialog
Formatted and fixed minor details
ShowHideColumnHelper nows supports also TreeViewers
Use ShowHideColumnHelper for taxonomy tree views
Extracted Column from ShowHideColumnHelper
Add column configuration to taxonomy view
Marked file dirty if edited via cell editor in securities list
Removed good old CellEditorFactory
Fixed drag and drop in taxonomy view

- prevent dropping a parent into one of its children
- nodes vanish if dropped into their parent