Complete initial GTK# UI

[ibboard]

Parent ticket for various UI tasks.

(In r132) Re #10 (Code readability) and Re #86 (Complete GTK# GUI):

• Update UnitDisplayWidget to use new way of getting unit stats

Remove owner so that the team can more easily see bugs. Using default owners seems good at first but is bad practice when a team can be working on any part of the project.

(In r137) Re #86: Complete initial GTK# UI

• Make use of new GTK# util code to add close button to tab

(In r195) Re #86: Initial GTK# GUI

• Add GTK# icons to menus where a sensible one exists

(In r196) Re #86: Initial GTK# GUI (because of Re #53)

• Refactor file saving in to a common method
• Replace fixed location with dialog

(In r206) Re #86: Complete initial GTK# UI

• Enable "open" buttons now that saving is starting to work

(In r209) Re #86: Complete initial GTK# UI

• Enable "open" buttons
• Fill out "open" method
• Fix showing of "save failed" dialog

(In r284) Re #86: Complete GTK# UI

• Make save buttons enable when a change has been made, whether the file was saved or not
• Make the Save button default to "Save As" behaviour if the file hasn't been saved before
• Make sure that loaded file path is kept and that it is wiped on file load

Move tickets to new "confirmed" status to show that they've been checked

(In r457) Re #86: Complete initial GTK# UI

• Add default config file to build
• Auto-updates of source code