Merge remote-tracking branch 'sunset/process-enter'

Fix wxTE_PROCESS_ENTER logic for wxMSW and wxGTK too.

See https://github.com/wxWidgets/wxWidgets/pull/1415

Closes #18273.

src/gtk/textctrl.cpp

@@ -1728,6 +1728,12 @@ void wxTextCtrl::OnChar( wxKeyEvent &key_event )
             event.SetString(GetValue());
             if ( HandleWindowEvent(event) )
                 return;
+
+            // We disable built-in default button activation when
+            // wxTE_PROCESS_ENTER is used, but we still should activate it
+            // if the event wasn't handled, so do it from here.
+            if ( ClickDefaultButtonIfPossible() )
+                return;
         }
     }