Processed core, tools and default modules to utilize assets
Converted all console types that were string based, such as TypeImageFilename to utilize const char*/the string table, which avoids a lot of type swapping shenanigans and avoids string corruption
Removed unneeded MainEditor mockup module
Removed some unused/duplicate image assets from the tools
Adds sanity check to editing of gameasset script action in asset browser
Updates module template file
Updates visualizers
Fixes checking of popup menu items
Adds stub for TerrainMaterialAsset