ABPUI release 2019-4
MR for all the spec changes for ABP UI release 2019-4: https://gitlab.com/eyeo/adblockplus/abpui/adblockplusui/-/milestones/44
MR for all the spec changes for ABP UI release 2019-4: https://gitlab.com/eyeo/adblockplus/abpui/adblockplusui/-/milestones/44