Before this commit, the drag & drop feature for the Project "Tasks"
kanban view did not work if the drag sequence was initiated from the
title of the card.
This was due to the "o_kanban_record_headings" class having the CSS rule
`overflow: hidden`, because of a well known 6 year-long-and-counting
bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1352061
Namely: mouse enter|leave events won't fire on anything underneath
elements having `overflow: hidden`.
This commit solves this issue by introducing a dedicated class name
'o_dragged' to all elements dragged using the `draggable_hook_builder`,
and defining on it the CSS attributes that were assigned in JS before,
as well as `pointer-events: none` on itself and all its children to
avoid the issue mentioned above.
Also in this commit: fixed a syntax error in a CSS rule in project's
"task_name_with_subtask_count_char_field" widget.
closesodoo/odoo#105353
Related: odoo/enterprise#33774
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Julien Mougenot
cda3396546