Foundry: Feature request: Disable loading of Toad House levels

[opsodps]

Trying to load these in Foundry just results in garbage data, probably due to the levels being in a different format than the main ones. I feel it would be a better idea to just disable loading of these levels until if/when Foundry adds a feature to properly edit them.

People new to the program might not understand what's happening when trying to load into one of these levels, and attempt to edit them, corrupting the level or their ROM.