Fix opentopomap tile fetching errors

[erodarob]

Description:

Some of the attempts to fetch tiles from the opentopomap tile servers are returning 404 errors that spam the console. The map still loads, but the source of these errors should be found.

Tasks:

• [ ] Locate the source of the errors
• [ ] Determine whether this is a bug or some of the servers are just not responding
• [ ] If it is a bug, fix the issue, otherwise suppress the errors

Notes:

This may be an issue with the leaflet tile providers library because this library has not been brought up to date recently.

[erodarob]

As far as I can tell this issue seems to have resolved itself. Will reopen if the issue pops up again.