* Update inspector only if it is visible
* Get rid of NSLog messages about deleted nonexistent rows.
* Maybe have TIFF icon instead of PNG?
* UnicodeData: return "<private use>" instead of "<not assigned>" for
  private use blocks.
* Maybe enable dragging of characters and dropping on display NSTextField
* Remove GS-specific features to work towards Mac OSX compatibility
* Deactivate superfluous cells
* A goto option (by using the hex number or Unicode name)
* A Help feature using Nicholas Roard's HelpViewer (should wait until
  there are actual features)

