macOS build fixes

syncing with source

Populated comboboxes and tooltips

Map resizing and improved floodfill

sync with source

Allow changing map tilesets

Add ability to change map border

Events Editing

Are these only present on non-Windows computers?

Support new map organization

Update parsing of new object_event macro

'Map Object' -> 'Event Object'

Fix event_object_movement.c filepath

Edit Map Connections

Properly support painting tiles from secondary tileset