Shows the reboot required message when changing a parental setting.
Changes the label on the apply parental settings button to 'Apply Changes'
Merge pull request #196 from KanoComputing/apply_changes

Changes the copy on the apply parental settings button to 'Apply Changes'
Merge pull request #194 from KanoComputing/parental_reboot

Shows the reboot required message when changing a parental setting
Changes the added sites selection colour. (KanoComputing/peldins#1444)
Disables the Add button from the blacklist page when editing an entry. (KanoComputing/peldins#1444)
Switches the blacklist add and remove buttons to be Kano buttons.
Disables the remove blocked site button when there are no entries in the list. (KanoComputing/peldins#1444)
Fixes crashing when adding an empty entry into the blacklist. (KanoComputing/peldins#1444)
Improves the layout of the allow and block sites screen. (KanoComputing/peldins#1444)