set game modified removed srb2 2.2.10

just an quick update to 2.2.10

Full Changelog: SRB2_release_2.2.9...SRB2_modloading_2.2.10

2212-pre3 appimage

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SRB2 2.2.9 addon loading doesn't affect modified game

I'm glad I have ported my 2.2.8 source build which I didn't release =p but I made it beater at the time I didn't know what I was doing when working with the source code so I removed EVERYTHING that had setgamemodified=true or setgamemodified=multiplayer to false but this one has only the when you load a wad file it will set it modified so weather you are a mod developer or want to use mods and save without the game modified flag being enabled without custom save.soc here it is