Overall changes / Fixes

- Added showing of item id on bottom bar
- Now you can use RMB to deselect actual tools
- Some smaller changer
Merge branch 'tweaks-and-fixes' of https://github.com/Crypton33/forgottenmapeditor

* 'tweaks-and-fixes' of https://github.com/Crypton33/forgottenmapeditor:
  Overall changes / Fixes