[wip] Reposition toolbar dropdown on window resize

Bug # 7665

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Reposition only the visible toolbar dropdown

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Merge pull request #1375 from opf/fix/reposition-dropdown-on-resize

Reposition toolbar dropdown on resize (or zoom in/out)