Menus clean-up

[ghost]

There are many options that are either not needed anymore or don't function properly. The list is incomplete and likely to change in the future.

• Since the removal of internal server capability "Map Browser" should probably be completely removed and "Server Browser" should just be renamed to "Play". (A more invasive option is to list servers in the main menu while moving other options below or to the side.)
• Resolution setting applies instantly but still prompts to reload the game to apply it.
• "Edit" category should be removed as the editor is not going to be built-in.

Someone more knowledgeable than me with regards to the engine's cut features would probably need to go through the options and check if they are still applicable, although that should be saved for until we're otherwise ready for release.