tdf#92357 clear tab type switcher button of ruler

before drawing the new icon

(cherry-picked from
commit e74bc6b9)

Conflicts:
	svtools/source/control/ruler.cxx

Change-Id: Ibbdbed448f965848429ace28dcfae47efc982164
Reviewed-on: https://gerrit.libreoffice.org/18376Reviewed-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>
Tested-by: Adolfo Jayme Barrientos <fitojb@ubuntu.com>

svtools/source/control/ruler.cxx

@@ -2534,7 +2534,7 @@ void Ruler::SetExtraType( RulerExtra eNewExtraType, sal_uInt16 nStyle )
         meExtraType  = eNewExtraType;
         mnExtraStyle = nStyle;
         if (IsReallyVisible() && IsUpdateMode())
-            Invalidate(INVALIDATE_NOERASE);
+            Invalidate();
     }
 }