LayoutSaver: Fix rounding errors when doing a relative restore

After a restore with relative sizes the items might not be on a pixel
perfect position regarding to their anchors. Make sure they are after
the restore is complete.

src/private/multisplitter/MultiSplitterLayout.cpp

@@ -1080,6 +1080,7 @@ void MultiSplitterLayout::positionStaticAnchors()
 
 void MultiSplitterLayout::redistributeSpace()
 {
+    positionStaticAnchors();
     redistributeSpace_recursive(m_leftAnchor, 0);
     redistributeSpace_recursive(m_topAnchor, 0);
 }