Keymap: toggle all gizmos with Ctrl-`

Was only toggling transform gizmos, which is too specific
in cases where users might want to remove gizmos from the view.

This also follows the top-level button which is most prominent in the UI.

release/scripts/presets/keyconfig/keymap_data/blender_default.py

@@ -1078,7 +1078,7 @@ def km_view3d(params):
         items.extend([
             op_menu_pie("VIEW3D_MT_snap_pie", {"type": 'S', "value": 'PRESS', "shift": True}),
             ("wm.context_toggle", {"type": 'ACCENT_GRAVE', "value": 'PRESS', "ctrl": True},
-             {"properties": [("data_path", 'space_data.show_gizmo_context')]}),
+             {"properties": [("data_path", 'space_data.show_gizmo')]}),
             op_menu_pie("VIEW3D_MT_pivot_pie", {"type": 'PERIOD', "value": 'PRESS'}),
             op_menu_pie("VIEW3D_MT_orientations_pie", {"type": 'COMMA', "value": 'PRESS'}),
             op_menu_pie(