Internationalise a couple of forgotten strings

Change-Id: Ia17cbcd7d5127ca83a925ce9f31bf095a23062e8
Partial-Bug: #1224338
Closes-Bug: #1224289
Redirecting user back to previous screen

After browser session timeout, the user is now redirected back to the previous
screen upon login.
Also added a non regression unittest.

Change-Id: I995bc217803805364967688e9b896b9b54583b36
Closes-Bug: #1201619
Merge "Redirecting user back to previous screen"
Minor cleanups on FWaaS message strings

Closes-Bugs: #1224839

- Remove a trailing colon for better consistency of the item names
  in FWaaS rule detail.
- Add a missing space in the message in FWaaS policy creation form.

Change-Id: Ie09a9266831064f0c4b588f8abfd799dfeeb3a33
Merge "Internationalise a couple of forgotten strings"
Merge "Minor cleanups on FWaaS message strings"
Update English PO files (source lang of translations)

Change-Id: I10c1f7a4ed6248081b718c159c8899c98baf8091