This adds:
- support to freeze movement to x or y axis when dragging the
marker (depends on the marker type - column or row marker)
- change marker on hover, which uses a different image, which is
solved in css
- change cursor to col-resize / row-resize when howering over the
marker
Change-Id: I63bf5e82860ef75f2dfde31ee2ab7ede6f61ce70
Reviewed-on: https://gerrit.libreoffice.org/77652
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>
