Reimplement GUI entry for notes for equipment
In the old UI we had a menu entry on the context menu for equipment items to set a user-definable note entry that xould be accessed on the output sheet as EQ.%equip.NOTE. This entry option is missing in the new UI.
Implemented as of Subversion revision 22597.
Interesting: the low-level functionality to set a note on an Equipment item is present, but there is no remaining code from that functionality in PCGVer2Parser/Creator.