Blender Git Loki

Fix T67084: Modal keymaps could show the wrong shortcut

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