Removed link to missing external PDF from design guide.
Tabbedinterface: fixed check for hidden child tab panels
Merge pull request #2656 from patheard/nested-tabs

Tabbedinterface: fixed check for hidden child tab panels
i18n: grammar fix to session timeout message
Merge branch 'v3.0'
Merge pull request #2640 from EricDunsworth/v3.1-broken-link-fixes

Removed link to missing external PDF from design guide.
Merge pull request #2658 from patheard/session-timeout-text

i18n: grammar fix to session timeout message
Updated i18n strings with latest translations.
Fixed IE9 printing of Canada wordmark in GCWU theme (#2510).
Merge pull request #2659 from pjackson28/master

Fixed IE9 printing of Canada wordmark in GCWU theme (#2510)