Tileset editor ommision?

[darkhog]

I can't seem to find a way to resize/add patterns without editing the file in notepad.

[Christopho]

You can add new patterns in the tileset editor by drawing their rectangle. You can't resize them (yet?), you have to delete and recreate them instead.
Feel free to report feature requests on the bugtracker: https://github.com/christopho/solarus/issues/new