Navigating mobility / Started updating

TODO:
Minimap
Brushpalette
Updating corelib files to latest state
Refractoring / Tweaks to placing items / Update Cursors
Merge branch 'master' of https://github.com/TheSumm/forgottenmapeditor

* https://github.com/TheSumm/forgottenmapeditor:
  Refractoring / Tweaks to placing items / Update Cursors
  Updating corelib files to latest state
  Navigating mobility / Started updating
ItemPallet: minor bug fix
Overall minor changes