Allow Dividers in Attributes, and Primary Hit Locations to act as Collapsible Containers

[Jaso1111]

Please make it possible for Sub-locations on the Hit Location Table, to be collapsed into the Primary locations.

Please make it possible for the dividers in Attributes to be collapsible containers which hide all of the attributes when collapsed.

The sheet can get pretty crowded when one really puts to use all the cool stuff we can do now(make sub-locations, make new attributes, etc.)