Change page header heading to H1

Partially implements: blueprint detail-pages-ia

Change-Id: I42b58e73fd3990c5b5e197e5694eb77eeb42f77c
Move translator notes just before translatable strings

Translator notes must be placed just before strings.
Otherwise translator notes are ignored when generating POT files.
We need to be careful when we use multiline *gettext* methods.
How to detect them is a future topic in I18N team.

Change-Id: I808271c76b1669b15ecc20b291493a4f751d546e
Closes-Bug: #1375607
Fix E127 errors in openstack_dashboard/dashboards/admin/

E127 continuation line over-indented for visual indent

Partial-Bug: #1375931
Change-Id: I0c3a95633e267294fc3b5576be2fc3c374b4b5d8
Support BS3 events in Retrieve Instance Pw

Bootstrap 3 event changed from 'show' to 'show.bs.modal'.

Change-Id: I5d61141c7170dfc57345517bf263e95a8622914f
Closes-Bug: #1354076
Merge "Fix E127 errors in openstack_dashboard/dashboards/admin/"
Merge "Move translator notes just before translatable strings"
Merge "Change page header heading to H1"
Merge "Support BS3 events in Retrieve Instance Pw"
Merge branch 'master' of https://github.com/openstack/horizon