Before this commit, the notebook tabs were skipped when navigating with
the keyboard tab or shift+tab keyboard shortcuts. This commit simply
modify the tabindex to 0, so they are not ignored.
Users can now move through the tabs with the tab key, and press enter to
activate a specific tab.
Note that there is not tests because that kind of user interaction cannot
be simulated from the js code
closes odoo/odoo#116874
Task: #2622077
X-original-commit: 1a9a4aef728b406b4c3a1c99cb66e3fc4fd4ff52
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Signed-off-by: Géry Debongnie <ged@odoo.com>