Merge pull request #183 from KanoComputing/proxy

disable proxy if we couldn't successfully enable it
Merge pull request #184 from KanoComputing/gtk-sync-bug

fix for disabling proxy UI as well
proxy without username and password
Merge pull request #185 from KanoComputing/proxy

proxy without username and password
Added About skeleton https://github.com/KanoComputing/peldins/issues/1402
Added Notifications skeleton https://github.com/KanoComputing/peldins/issues/1401
Modified set_notifications screen
Changed labels in json for notification window KanoComputing/peldins#1401
Changed notification icon KanoComputing/peldins#1401
About window now gets the version, temperature and space available on the system KanoComputing/peldins#1402
Merge branch 'about-window'
Modifications to the styling of the about screen peldins/KanoComputing#1402
Adds policy settings for chromium.
Adds parental DNS.
Adds ability to add sites which are blacklisted.
Adds ability to add sites which are whitelisted.
Adds parental control GUI