Fix T93629: Reset to defaults undoes all steps when applied twice

Reset Defaults left the undo stack in an invalid state,
with the active undo step left at the previous state then it should
have been.

Now the buttons own undo logic is used to perform undo pushes.

1 files changed, 6 insertions, 1 deletions

diff --git a/source/blender/editors/interface/interface_handlers.c b/source/blender/editors/interface/interface_handlers.c
index 905fd452b6c..d947db463ee 100644
--- a/source/blender/editors/interface/interface_handlers.c
+++ b/source/blender/editors/interface/interface_handlers.c
@@ -8802,7 +8802,7 @@ uiBut *UI_context_active_but_prop_get(const bContext *C,
   return activebut;
 }
 
-void UI_context_active_but_prop_handle(bContext *C)
+void UI_context_active_but_prop_handle(bContext *C, const bool handle_undo)
 {
   uiBut *activebut = ui_context_rna_button_active(C);
   if (activebut) {
@@ -8813,6 +8813,11 @@ void UI_context_active_but_prop_handle(bContext *C)
     if (block->handle_func) {
       block->handle_func(C, block->handle_func_arg, activebut->retval);
     }
+    if (handle_undo) {
+      /* Update the button so the undo text uses the correct value. */
+      ui_but_update(activebut);
+      ui_apply_but_undo(activebut);
+    }
   }
 }