CComponentsText: add signal OnBeforePaint into text paint() methode

Origin commit data
------------------
Commit: 53f956c0f9
Author: Thilo Graf <dbt@novatux.de>
Date: 2017-01-27 (Fri, 27 Jan 2017)

src/gui/components/cc_item_text.cpp

@@ -285,6 +285,7 @@ void CComponentsText::paintText(bool do_save_bg)
 
 void CComponentsText::paint(bool do_save_bg)
 {
+	OnBeforePaint();
 	paintText(do_save_bg);
 }