dungeon → workspace Relation

File in src/app/editor/dungeon	Includes file in src/app/editor/dungeon/workspace
dungeon_editor_v2.cc	dungeon_workbench_content.h
dungeon_editor_v2.cc	room_browser_content.h
dungeon_editor_v2.cc	room_graphics_content.h
dungeon_editor_v2.cc	room_matrix_content.h
dungeon_editor_v2.h	room_graphics_content.h