Separate Layouts and Maps

[garakmon]

Feature-complete. In need of cleanup and testing.

Internally removes Layout related code from the Map class.
Creates a new layout-only edit mode.
Adds ability to modify map groups.

closes #182
closes #477
closes #181
closes #334

TODO:

• Edit history in timeplapse replays both layouts and events in order of edits made
• Add new map group & map section & layout without map + delete all above + [Feature Request] Allow Porymap to create new gMapGroups if the one specified doesn't exist by default #550 +rename
• ScriptUtility::setMainTab(int index) consider edit mode
• reassigning layouts silences "Setting Map" message log
• toggle view on empty folders in mapList (map sections, groups, layouts)
• number map sections?
• fix all scripting API functions
• rearrange map groups?
• drop gMapGroup_ prefix requirement for map groups
• use NewMapPopup::initUi where needed
• [BUG] switching to "Connections" tab disables map edits permanently
• Fix loading recent map except it's a layout
• Rearrange and rename map sections?

[GriffinRichards]

Alright I'm nearly done adding to this. The main outstanding thing I'd like to fix is how we're reading/writing the constants_region_map_sections file. If I can update the project repos to generate that file using json_region_map_entries it should be a much simpler process. (EDIT: Finished. This now depends on the changes in pret/pokeemerald#2063)

There's a few bugs I'd like to address after that (mainly that resizing the map with the scripting API doesn't quite work right now), and then the rest of the TODO comments I added I'll leave to be addressed after this PR is merged:

• I have some quibbles with the New Map/Layout dialogs, but I have a bunch of incoming changes for the New Map dialog so I'll address those then.
• Changing Location on the Header tab doesn't update the map list. This'll also be easier to do after the incoming changes above, which includes changes to Map so that it will send signals when its header properties are changed.
• Once the config updates are finished, the state of the new toggleable buttons in the map list tool bar should be saved in the config.
• I left a bunch of comments related to the lack of support for deleting maps/layouts, that's obviously a bigger thing that can be addressed some other time.
• Creating a new map automatically saves the project. It should allow users to close and discard the changes instead (this was true before the PR, though the behavior is changed slightly)
• The API should be updated to have some functionality for the new layout features (e.g. a callback when a layout is opened or swapped)