Bug 33622: Notice content does not show on default tab if TranslateNotices enabled

Bug 33622: Notice content does not show on default tab if TranslateNotices enabled

This patch fixes a conflict between the template-generated markup and
Bootstrap JS which were both competing to show the correct default tab.
It's simpler to rely on JavaScript.

To test, apply the patch and enable the TranslateNotices system
preference if necessary.

- Go to Tools -> Notices & slips
- Go to edit any notice e.g. DUEDGST
- The page should load with the "Default" tab selected by default.
- Enter unique titles and contents under each tab to confirm that the
  data you see under the "Default" or "English (en)" tab is being shown
  in the right place.
- Save your modified notice and edit it again to confirm that the tabs
  correspond correctly to your data.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>