sysclk: fix default text in temporary overrides for display

Source/sys-clk/overlay/src/ui/gui/global_override_gui.cpp

@@ -89,7 +89,8 @@ void GlobalOverrideGui::openValueChoiceGui(
         enableThresholds,
         labels,
         namedValues,
-        showDefaultValue
+        showDefaultValue,
+        true
     );
 }