Electron v2.0.0 (#47289)

* Update to Electron 2.0.0-beta.7

* bump to electron 2.0.0-beta.7

* localStorage - workaround birthtime rounding issues that clear workspace storage

* fix compile error

* workaround #47569

* localStorage - add telemetry for successful migration

* increment to localStorageTimers4

* localStorage - allow to restore from backup if starting with 1.7.x again

* logLocalStorageMigrationStatus only on insider

* back to official distro

* :lipstick:

* still use exploration distro

* remove GTK3 emoji picker which does not seem to work

* :lipstick: