[Feature Request] Texture Filters

Hey There

sorry if this has been mentioned before
but i thought it would be cool to filter textures by theme, scuh as tech type textures will only be seen if i turn on the filter for tech and so on
and any custom textures can have a filter for custom textures

this might work for things too
users can also make thier own filters too

This is already possible for textures and flats in the configuration file. Just make (copy) a configuration file (if you want to keep the original) and edit the structures "texturesfilter", "notexturesfilter", "flatsfilter" and "noflatsfilter". They are well commented, you should be able to understand.