Cannot cancel upon Tag/Category delete confirmation

[yoshi]

At wp-admin/edit-tags.php, there are some situations where confirmation for tag deletion doesn't work as expected.

1. After Quick edit and update a tag, clicking on Delete action immidiately deletes the tag without confirmation.

2. Add a new tag and click on Delete under the newly created tag, confirmation dialog will popup but pressing cancel won't stop the process.

Also the same for the category editing.

[azaozz]

This patch should fix it for the Tags screens but needs some testing. It uses some of the new methods in jQuery 1.3 and doesn't need wp-lists and the jQuery forms plugin.

If all is working well will add it on the categories and link categories screens too.

[azaozz]

(In [11676]) Use new jQuery methods when adding, editing and deleting tags with AJAX, fix warning when deleting tags, see #10239

[azaozz]

Seems to be working well.

[nacin]

Cross-referencing. Looks like this caused #11350.