Resource Sub-Folders & Organization

[lyimu]

Is your feature request related to a problem? Please describe.
I'm reaching the point where my mapping speeds and developing speeds are throttled by a lack of organization in my project.
I try to keep everything as organized as possible with tilesets and other assets starting with "indoors_tilesettype_etc,etc"but there is only so much I can do.

Describe the solution you'd like
Allow the Intersect Engine to recognize sub-folders inside of the resource folders and categorize them when selecting tiles, sprites, items, paperdolls etc.

Image Context
Categorizing your tilesets into sub-folders would look something like this in the tilesets folder.

You would then be able to select the category and then select the tileset inside that category like this.

(just imagine the category box is at the top though)

Alternative Workarounds
Say the idea above doesn't work for some people, perhaps instead of creating sub-folders yourself in your resource folders just naming your tilesets in a certain way would do it for you.

Like this:

(Of course make this a optional feature via config as it could conflict with existing projects)

[WeylonSantana]

I'm all for it! if there was a way to do it dynamically. But I would like to add that this should be for b8 only