add BRIDGE_FILTERTYPE_MODIFIER_LOCKED_NOT, BRIDGE_FILTERTYPE_MODIFIER_LOCKED_ONLY
support BRIDGE_FILTERTYPE_MODIFIER_LOCKED_* in xml_compiler
add FlagStatus::isLocked
add ModifierLockedFilter
fix ModifierLockedFilter
update pop_front, pop_back tests
rename List::front,back -> List::safe_front,safe_back
update comment
List* -> List
version 10.2.5