UI: add menu search functionality to operator search menu

This has some advantages over operator search:

- Some operators need options set to be usefully accessed.
- Shows key bindings to access menus
  (for actions that don't have key bindings themselves).
- Non operator actions such as check-boxes are also shown.
- Menu items can control execution context, using invoke or execute
  where appropriate so we can control how the operator runs.

Part of the design task T74157.

This can be tested using the 'Experimental' preferences section
or selected in the key-map editor.

1 files changed, 3 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_userdef_types.h b/source/blender/makesdna/DNA_userdef_types.h
index 30b4098c2bb..54470dc59fc 100644
--- a/source/blender/makesdna/DNA_userdef_types.h
+++ b/source/blender/makesdna/DNA_userdef_types.h
@@ -619,7 +619,9 @@ typedef struct UserDef_FileSpaceData {
 
 typedef struct UserDef_Experimental {
   char use_undo_speedup;
-  char _pad0[7]; /* makesdna does not allow empty structs. */
+  char use_menu_search;
+  /** `makesdna` does not allow empty structs. */
+  char _pad0[6];
 } UserDef_Experimental;
 
 #define USER_EXPERIMENTAL_TEST(userdef, member) \