WorkSpace: show/hode opt-out support for addons

In some cases it doesn't make sense for add-ons to be listed for hiding.
Especially for import/export which use minimal UI space.

This adds `bl_info["use_owner"]` to add-ons,
currently defaulting to True for all non Import-Export add-ons.

release/scripts/modules/addon_utils.py

@@ -352,10 +352,11 @@ def enable(module_name, *, default_set=False, persistent=False, handle_error=Non
         # 2) try register collected modules
         # removed, addons need to handle own registration now.
 
-
-        from _bpy import _bl_owner_id_get, _bl_owner_id_set
-        owner_id_prev = _bl_owner_id_get()
-        _bl_owner_id_set(module_name)
+        use_owner = mod.bl_info.get("use_owner", True)
+        if use_owner:
+            from _bpy import _bl_owner_id_get, _bl_owner_id_set
+            owner_id_prev = _bl_owner_id_get()
+            _bl_owner_id_set(module_name)
 
         # 3) try run the modules register function
         try:
@@ -369,7 +370,8 @@ def enable(module_name, *, default_set=False, persistent=False, handle_error=Non
                 _addon_remove(module_name)
             return None
         finally:
-            _bl_owner_id_set(owner_id_prev)
+            if use_owner:
+                _bl_owner_id_set(owner_id_prev)
 
     # * OK loaded successfully! *
     mod.__addon_enabled__ = True
@@ -480,6 +482,7 @@ def module_bl_info(mod, info_basis=None):
             "category": "",
             "warning": "",
             "show_expanded": False,
+            "use_owner": True,
         }
 
     addon_info = getattr(mod, "bl_info", {})
@@ -497,5 +500,9 @@ def module_bl_info(mod, info_basis=None):
     if not addon_info["name"]:
         addon_info["name"] = mod.__name__
 
+    # Temporary auto-magic, don't use_owner for import export menus.
+    if mod.bl_info["category"] == "Import-Export":
+        mod.bl_info["use_owner"] = False
+
     addon_info["_init"] = None
     return addon_info