This commit button makes the kanban substack button
clickable everywhere - both in the icon and the x/y
indication next to it.
Additionally, this commit also makes it that the tooltip
on hover is shown when the user hovers over both the icon
and the x/y indication.
Task-3284498
closesodoo/odoo#119468
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>