I was kinda annoyed at not being able to reset custom tilesets ingame while editing one the other day, so I decided to create a small mod to make that possible. Here it is:
OrbitalBlueprint's F5 Mod!
Press F5 while using the editor to reload the custom tileset. That's it, basically.
v0.1a (Modded version of the community bug fix release, requires LÖVE 0.9.0)
Please inform me of any bugs/things I have to change if any. I might take requests for more stuff to make using the editor more comfortable if there's a demand for it.