Project saving/opening improvements; Some additions and fixes.
So what's this???After the upgrade, the project no longer runs!Screenshoot this bug--->https://drive.google.com/open?id=1v9oSAxFpQLCRp0wEWcZIXS4X8_saOvkk
Please file any bugs here following all the guidelines otherwise we cannot help: https://github.com/Scirra/Construct-3-bugs