v1.4.2 - Migration to react, bug fixing and enhancements

The React migration has been completed.

There were also some Enhancements and Bug fixes that we managed to implement:

Bug fixing:

Save event details after being edited #183
Sidebar timeline buttons state #200
Overview chart - show longest timeline #201
Synchronize overview chart when deleting an event #203
Add sidebar zoom #204
Switching pipeline does not change experiments #209
Deleting last filter events throws an error #211
Zoom on chart when selecting time range from sidebar #215
Have problems in creating and deleting events #220
Filter by tag does not work for untagged label #221
Showing largest event period created desynchronized event edit between overview and focus chart #224
Add loaders animations #225
Page switch problem (react migration remaining issue)

Enhancement

Reset brush when selecting new Datarun #166