v3.99.105 (AGS 4.0 Early Alpha)

This is AGS 4.0 early alpha (2).

Contains updates and fixes from 3.6.1 Beta 3.

Other changes:

Editor:

• Fixed 24-bit room backgrounds could display fully transparent in the Editor after project upgrade.
• (possibly) Fixed incorrect "script was modified externally" message occuring when it was not actually modified externally.

Compiler:

• Fixed ++ and -- operators could be used wrongly as a binary op (like a ++ b), and compiler did not detect any error.

Engine:

• Fixed character/object scaling not working at all, because of a typo in code.