Update OpenCollar - rlvmain.lsl

no need MENUNAME_RESPONSE for Main menu, because it is not processed in main script.

add update submenu for "Fix Menus"
Merge pull request #199 from RomkaSwallowtail/patch-88

OpenCollar - rlvmain.lsl  bug:  RLV submenu don't update on "Fix Menus"