[wip] Reposition context menu on window resize

Initial solution for column context menu.

See also 2109d5fb.

Bug # 15399

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Update angular-context-menu to 0.1.15

Signed-off-by: Alex Coles <alex@alexbcoles.com>
Reposition context menu only to the opened column.
Merge pull request #1862 from opf/feature/15399-reposition-context-menu-on-window-resize

15399 Reposition context menu on window resize