This adds table markers for resizing rows and columns if the user
has the table selected or the cursor is in the table. The code
reacts to the callback "tableselected:", where the markers are
created for each column and row, if the payload (json) of course
has any data. When the marker is dragged, a uno command to resize
the table column or row border is send to the core.
Change-Id: I9b21d09639c1b2be70a1a897f9e3340b453d847e
Reviewed-on: https://gerrit.libreoffice.org/77360
Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>
