text screen save: try to rework screen save behavior for textbox objects

Screen save now always disabled by default and can be controlled
outside of relevant objects.

src/gui/components/cc_frm_button.cpp

@@ -174,6 +174,7 @@ void CComponentsButton::initCaption()
 		if (cc_btn_capt_obj == NULL){
 			cc_btn_capt_obj = new CComponentsLabel();
 			cc_btn_capt_obj->doPaintBg(false);
+			cc_btn_capt_obj->doPaintTextBoxBg(false);
 			cc_btn_capt_obj->enableTboxSaveScreen(cc_txt_save_screen);
 			addCCItem(cc_btn_capt_obj);
 		}