Backporting to beta (#4741)

* New chains (#4720)

* Add Kovan chain.

* Fix up --testnet.

* Fix tests.

* Fix test.

* fix test

* Fix test.

* Fix to UglifyJS 2.8.2 to fix app build issues (#4723)

* Update classic bootnodes, ref #4717 (#4735)

* allow failure docker beta

* adjust pruning history default to 64 (#4709)

* backporting from master

[ci-skip]update docker-build.sh

* update gitlab.ci

fix docker hub build
[ci skip]

* update gitlab

docker beta-release->latest

* Add registry.

* Add info on forks.

* Fixed spec file

* Support both V1 & V2 DataChanged events in registry (#4734)

* Add info on forks.

* Add new registry ABI

* Import registry2 & fix exports

* Select ABI based on code hash

* Render new event types (owner not available)

* New registry.

* Rename old chain.

* Fix test.

* Another fix.

* Finish rename.

* Fixed fonts URLs (#4579)

* Fix Token Reg Dapp issues in Firefox (#4489)

* Fix overflow issues in Firefox (#4348)

* Fix wrong Promise inferance

* Add new Componennt for Token Images (#4496)

* Revert "Add new Componennt for Token Images (#4496)"

This reverts commit 6ffbdab8.

* Add StackEventListener (#4745)

* Update testnet detection (#4746)

* Fix Account Selection in Signer (#4744)

* Can pass FormattedMessage to Input (eg. Status // RPC Enabled)

* Simple fixed-width fix for Accoutn Selection in Parity Signer