The Update and Remove commands existed and were enabled only when the
document had that kind of mark, but no menu listed them. A tool entry in
the catalogue can now list further commands (ToolItem::actions); the tool
panel shows a caret and opens a menu, each command enabled by its own
needs. Add stays usable with no document open (it asks for a file first).
Tests: the catalogue's menus name registered commands starting with the
entry's own, and every edit.*.update / edit.*.remove is reachable from a
tool entry.
Alexis
0a054a425c