ToontownBetaExplorer: Add complimentary toggle hotkeys

[loonaticx]

Adds a few toggle hotkeys to enhance the viewing experience: T --> Toggle Textures W --> Toggle Wireframe V --> Toggle Vertex Painting C --> Toggle Collision Bounds B --> Toggle Backface Culling

[JoeyZio]

Thanks for adding these features, and apologies for the multi-year wait to merge them!