[XB] Solved Question Prefix 2.0.0 Patch Level 2

Added a workaround to bypass SV/MultiPrefix prefix validation when the prefix is not allowed for the visitor user group

Fix: revert back to default forum prefix on solution unset

2.0.0
XF 2.2 and 2.3 compatibility

Added rebuild tool to apply prefix for old threads

Properly include js file

Added option to remove certain prefixes after marking question solution (available only if Xon's MultiPrefix installed)

Fixed saving node options on "mixed" general discussion forums