Portrait modes update (+other stuff)

[Jowan-Spooner]

Character portrait modes

... have been removed! Hurray!
Seriously tho. Instead portrait containers can now choose between two modes: Position and Speaker.

• POSITION mode is like previously. It has an index and can be joined/moved to.
  • A character cannot be on multiple position containers at the same time.
• SPEAKER mode will automatically join the current speaker whenever there is one.
  • speaker mode can have a portrait prefix setup. This allows using a different set of portraits for the speaker container (e.g. instead of "happy" a prefix of "Face/" would show the "Face/happy" portrait).
    -> this means both modes can now be used at the same time
    -> it also means that this is now dependent on the layout scenes setup (no external setting)

To make this work I had to rewrite a lot of the portrait subsystems methods.
This means there is now a set of methods that allow manipulating a portrait based on the actual portrait node (not the character). There is also another set of methods for the position mode (VN-style portaits; used by the character event). These methods will make sure the character is joined and wont allow duplicate characters. A join_character(), leave_character() methods have been added to make character event functionality more accessable. The second set of methods uses the first under the hood (with extra checks and functionality around).

Other changes

Along the way numerous other things have been fixed...

• bbcodes no longer mess up text effects
• variable and glossary parsing has been moved into the parse_text() method
• text bubble overrides are now correctly applied again
• rpg layout scene has been reworked, removing the texture
• default layout portraits now have better anchors
• added helpful documentation comments to portraits_subsystem
• removed portrait mode setting from portrait settings
• added two preview portraits to the debug character (full character and speaker closeup)
• removed portrait holder (not sure why it was still there)
• add text editor autocompletion for "Settings"

[Jowan-Spooner]

I will merge this and continue on portraits for some more.