ESRI base maps hides overlays

[zstadler]

Bug

What I expect to happen

Map overlays should be visible on top of ESRI base maps

What really happened

ESRI base maps are covering map overlays

What I did that caused the issue - step by step

1. Open the https://israelhiking.osm.org.il/share/JoKWORRFxK
2. You may be able to see the overlay downloaded first
   
   and then the ESRI base map covers it:
   

This also happens in private/anonymous mode

My environment

• Operating System and version: Win 10 home
• Web Browser and version:
  • Firefox 56.0.2 (64-bit)
  • Microsoft Edge 42.17134.1.0
  • Chrome 68.0.3440.106 (Official Build) (64-bit)

[HarelM]

Probably needs the following implementation of panes, I truly wonder why it works as expected for other layers... :-)
https://leafletjs.com/examples/map-panes/
http://esri.github.io/esri-leaflet/examples/layer-ordering.html

[HarelM]

Also depending on #669 - if we migrate to open layers this should be implemented differently.

[HarelM]

I don't think this is still relevant in beta code. relevant issue is now #860.