PSThar - v1.2

I was hoping to add Simultaneous Tileset support to PSThar so it could set both $CurLevel and $CurTileset in the same console, but in the interest of getting the other new features out to users as soon as possible, I decided to release what I have as v1.2. The only change I didn't mention yet was that, to make it clear which mode the console was opened in, "Level" or "Tileset" is added to the caption of the console window as appropriate.