[#16347] Patches media

Issue 1701914 by larowlan : Update the media thumbnail via AJAX when media browser or edit file modal is closed.
Issue 1956620 by larowlan : Fixed Pager on library tab always reloads page 1.
Merge pull request #159 from previousnext/16347-media-patches

[#16347] Patches media
[#16468] Include an about aGov page
[#16468] Fixed codestyle
Fix feature dependencies
[#16404] Use correct version of superfish library
Merge pull request #161 from previousnext/16404-superfish-library

[#16404] Use correct version of superfish library
17220 Update context module
Merge branch 'master' into 16468-about-agov
16468 code style
Merge pull request #160 from previousnext/16468-about-agov

[#16468] Include an about aGov page
Merge branch 'master' into 16209-typography-fixes
[#16209] Scale down publications page font sizing