Visual editor now supports Undo-Redo and variable grids

This week and this weekend I didn't have much time to work on the editor, so this is a minor update. The new features are not visually impressive but are quite important: We needed an undo/redo framework before we write hundreds of commands and actions. Introducing undo/redo later on would have been a PITA. The other important changes are enhancements to the grid engine, the grid is now resizable and there are presets you can pick from:

Well, just watch the video: