Lock Capability for Shared Parsers

NetBrain currently allows shared Qapps to be locked to prevent unintended or unauthorized changes, but shared parsers do not have an equivalent locking mechanism. This enhancement would extend the existing lock capability to shared parsers, allowing administrators to protect them from unreviewed edits. This is important because an unprotected shared parser can be modified inadvertently, which may in turn damage any shared Qapp that depends on it.