Replace Mapbox-based MakiMarkers with local default icon

[fsteeg]

Will resolve #1966, see e.g. http://stage.lobid.org/resources/990182586200206441

(And two other tweaks for things I noticed.)

[dr0i]

Code ok , but the marker cannot be loaded as only ./web/public/javascripts/images/marker-icon-2x.png exists but it wants ./web/public/javascripts/images/marker-icon.png .

[fsteeg]

That's weird, I actually had to rename the file since it wanted marker-icon-2x.png, not marker-icon.png. And I thought it was working when I deployed earlier. Will look into it.

[fsteeg]

Oh, I think I understand: my office screen is high-res, and I might have some scaling enabled on the OS level. So there, it requests the 2x version, so it worked when I tested and deployed it earlier. Now, on my home setup, I get the same error as you. Will add the other icon.

[fsteeg]

Deployed to test: http://test.lobid.org/resources/990182586200206441

(If you want, you could deploy to prod and stage if this is done and there is anything unusual to consider for deployment.)