[SUGGESTION] [EDITOR] Undo Button needed

[namida]

Fixed both of those, as well as another one - that "Save" didn't work properly after undoing or redoing (it didn't make it impossible to save, but rather, "Save" behaved like "Save As" in such a case). This was very closely related to the second one you mentioned.

Another one I've found is that after saving a level, any states which could've been Redo-ed to are lost (those that could be Undo-ed to are safe, though).

[namida]

Alright, experimental undo feature mark II!

https://www.dropbox.com/s/e1adey9srtx4uun/NeoLemmixEditor_V1.43n-B_1603290407.exe

This should fix the two bugs DynaLem mentioned, as well as the related one I found. I haven't fixed the lost-redo-states-on-save yet.

Note that this experimental version also incorporates all the other recent fixes / changes, so if you were interested in any of them, you could use this version too. Apart from the undo/redo I'm pretty confident in its stability being as good as the latest stable version, though I accept no responsibility if it turns out it isn't, it is still an experimental version.