Fix footer in plugins' notices.
Fix footer in plugins' notices.

Make it look like like normal notices. Footer element was missing.

eXcomm/gnu-social,eXcomm/gnu-social,bankonme/gnu-social,bankonme/gnu-social,charnimda/lgbtpzn-social,faulteh/gnu-social,chimo/social,furtherfield/gnu-social,foocorp/gnu-social,foocorp/gnu-social,bankonme/gnu-social,studio666/gnu-social,faulteh/gnu-social,furtherfield/gnu-social,chimo/social,furtherfield/gnu-social,chimo/social,charnimda/lgbtpzn-social,charnimda/lgbtpzn-social,Piratas/tortuga,studio666/gnu-social,Piratas/tortuga,bankonme/gnu-social,faulteh/gnu-social,eXcomm/gnu-social,studio666/gnu-social,foocorp/gnu-social,eXcomm/gnu-social,Piratas/tortuga,studio666/gnu-social,Piratas/tortuga,faulteh/gnu-social,furtherfield/gnu-social