MapEditor improved:
1. size of window if bigger than screen (e.g. cause of big map sizes) ->
sreen size
2. jscrollpane: vertical can be scrolled by holding shift (a bit buggy)
3. you can now hold you mouse and move over fields you want to change
4. when you close it askes you if you want to save
5. you can now set the displayed size of fields
6. added the option to choose one field with rightclick (red) and one
with leftclick (blue)