This should have X-Red-Hat-Base;Application;Settings; to appear in preferences
rather than System Tools
Name could just be Password, context implies you're changing it.
Comment could then be "Change password" (lowercase p there)
Move to /usr/share/applications, namespace the file, etc.
(Aside: really this tool could be a part of the userinfo tool instead of separate.)
Fixed in 1.56-1 and later.
Fix confirmed in usermode-gtk-1.69-4.