Fixes: NB#150732 - Button from hildon treeview action area disappears if it showed while changing model.
Fixes: NB#150732 - Button from hildon treeview action area
disappears if it showed while changing model.

Adjust the allocations and positions of treeview children when the
adjustment changes and do not update the dy value.

community-ssu/gtk,community-ssu/gtk,community-ssu/gtk,community-ssu/gtk,community-ssu/gtk