Changed combatant auto-numbering scheme: First instance of a combatant will display with no number. If a second copy is later added, first copy updates numbering with 1, then additional combatants increment by 1.

Fixed the display name textbox in the top middle to actually modify the name displayed on the web server.

Removed the display name textbox in the combatants listbox context menu (it was just awkward and didn't really work).
Fix for OutOfBoundsException when selecting different power when focus is in edited text box for a new power.
Fix for power listview deselecting item when selecting different power when focus is in edited text box.
Merge branch 'power_editor_fixes'