Fixed can not open couchdb credentials.

[fbewivpjsbsby]

This fix if couchdb need credentials, credentials page can not open issues.

• Built on platform(s)
  • [x] x86_64-linux
  • [ ] aarch64-linux
  • [ ] x86_64-darwin
  • [ ] aarch64-darwin
• [x] Tested basic functionality

[fbewivpjsbsby]

This fixed https://github.com/benweet/stackedit/issues/1826.