WM_modalkeymap_operator_items_to_string() wasnt checking
WM_keymap_active(), so it was possible that e.g. when using the Industry
Compatible keymap, the shortcut from the Blender keymap was shown.
This also fixes the (now exposed) bug that the Industry Compatible keymap
would not have a ADD_CUT_CLOSED kmi defined for the Knife Tool [mandatory
for the status bar].
Maniphest Tasks: T67084
Differential Revision: https://developer.blender.org/D6748
36d09d9029