In current implementation if you click on event in the left panel list, you can see event vector in separate panel, it would be good also to see the app-db data which was changed by this event, for example, if we had app-db

{:a 1 :b 3}

and selected event changed :b key on 4 we should see

{:b 4}

so it should be a difference of app-db before this event and after

This task should be done for both re-frisk and re-frisk-remote (flexsurfer/re-frisk-remote#4)