Improve Copy Paste tool with more options

[SCIPCION]

Copy paste tool is one of the most important tools of WAE, but sometimes is necesary delete objects to paste, it's specially a problem with smudges. and copy paste object properties could be useful as FA.

-Add an checkbox to overwrite each type of object, current WAE only replace overlays and tiles.
-Add an checkbox to copy object properties.

[Rampastring]

Copy-paste now allows replacing smudges cd6d164

Other types of objects (technos and terrain objects) are typically not replaced if you attempt to paint over them, so I don't think copy/paste should replace them either.