Experimental MultiSlot aka General Modslot Generator (GMSG) 2.5.1

Fixes:

• Fixed UI loading
• Fixed errors introduced with 0.37

Changes:

• Split files into multiple modules (doesn't affect user-experience)
• More Debugging options in the Utils tab under Advanced

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Additions:

• First parts for the upcoming inclusion of all "Additional - Modification" mods into MultiSlot.
  • This is not fully working yet but will be in an upcoming version