Quad marker tweaks

[Redstonneur1256]

• Allow for quad markers to have unclamped UV for textures with repeat/mirrored repeat

Tested the following cases with all different combinations of textures:

• create, texture, uv
• create, uv, texture
• create, texture, uv, texture
• create, uv, texture, texture
• map objectives
• saving and reloading for all of the above

• [X] I have read the contribution guidelines.
• [X] I have ensured that my code compiles, if applicable.
• [X] I have ensured that any new features in this PR function correctly in-game, if applicable.