(bug 44792) Merge "globalunblock" right into "globalblock"

Merging these two rights will make it more similar to the "block"
right that exists in core, as well as that there is no reason
in which a user would be given one right and not the other.

Change-Id: Idc399e19b3aea9a18473eaaf8709e3a47445a0e1
Merge "(bug 44792) Merge "globalunblock" right into "globalblock""