* Fix default %project%/Assets/ location when saving prefabs + scenes * Display error message box if it's not a valid assets location * Tweak "File > Save" enabled conditions to match if they'll do something
* Don't DrawInitialWindowImage in ToolsMode * Remove UpdateWindowSize call during editor startup
This commit imports the C# engine code and game files, excluding C++ source code. [Source-Commit: ceb3d758046e50faa6258bc3b658a30c97743268]