CComponents: rework position handling

The real position already used here, if item is bound to a parent.
(bound or embedded means: added with addCCItem() to a form)
This causes no separate calculation in paint methodes of embedded
sub items or sub forms and more nested sub forms.

CComponentsForm have also some new members
- exchangeCCItem() to exchange the order items
- setAppendOffset() to set an offset for auto append mode
  Autoappend is enabled if x or y have value -1 (defined also in CC_APPEND)
  x=horizontal, y=vertical
  Is this activated, no separate calculation of incremental offset
  is required.

However items with independent rendered parts, needs
a separate calculation. In some subclasses was this necessary.

src/gui/components/cc_item_tvpic.cpp

@@ -74,8 +74,9 @@ CComponentsPIP::~CComponentsPIP()
 
 void CComponentsPIP::paint(bool do_save_bg)
 {
-	int pig_x = x+fr_thickness;
-	int pig_y = y+fr_thickness;
+	//NOTE: real values are reqiured, if we paint not bound items or an own render methodes
+	int pig_x = (cc_parent ? cc_xr : x) + fr_thickness;
+	int pig_y = (cc_parent ? cc_yr : y) + fr_thickness;
 	int pig_w = width-2*fr_thickness;
 	int pig_h = height-2*fr_thickness;