Possible to removeLayers before addLayers

[gpbmike]

mapbox-gl-js version: v0.42.2
mapbox-gl-draw version: v1.0.4

Steps to Trigger Behavior

1. Add control.
2. Remove control before map is loaded (before control.addLayers is called).

Expected Behavior

Control should check for layers/sources before trying to remove them.

Actual Behavior

Many errors are thrown related to missing layers/sources.

eg: The layer 'gl-draw-polygon-fill-static.hot' does not exist in the map's style

Additional Details

Contrived CodePen example: https://codepen.io/gpbmike/pen/EbqNmp

My use case: User navigates to route with map then quickly navigates away before the map loads.

[mcwhittemore]

Hmmm... yea it looks like even map.removeControl(Draw) has to be called after map.on('load', () => {}) has been triggered.

I'm guessing we just need some extra handling here.

[gpbmike]

This looks like it was fixed sometime between v1.0.4 and v1.0.9. Perhaps by me? #685 😅