Element text item with are now converted to dynamic element text item.

From now, the class ElementTextItem is not anymore use in qet. Every texts in a diagram are DynamicElementTextItem.
the Xref item was adapted to dynamic text.
Previously, the comment and location, displayed as a "static text" below the "old text" tagged "label" are now automaticaly converted to DynamicElementTextItem, so visually, these texts stay unchanged 


git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5216 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/slaveelement.cpp

@@ -20,6 +20,7 @@
 #include "qetapp.h"
 #include "elementtextitem.h"
 #include "diagram.h"
+#include "dynamicelementtextitem.h"
 
 /**
  * @brief SlaveElement::SlaveElement
@@ -33,7 +34,8 @@ SlaveElement::SlaveElement(const ElementsLocation &location, QGraphicsItem *qgi,
 	CustomElement(location, qgi, state)
 {
 	m_xref_item = nullptr;
-	link_type_ = Slave;
+	m_link_type = Slave;
+	
 	connect(this, SIGNAL(updateLabel()), this, SLOT(updateLabel()));
 }