Remove dropdown workaround for user settings

Description of problem:

As part of https://github.com/openshift/console/pull/7390 we added a workaround to support favorited user settings to the dropdown. This should be fixed with https://github.com/openshift/console/pull/7411.

Prerequisites (if any, like setup, operators/versions):

None

Steps to Reproduce

1. Create some namespaces to allow you to switch between them
2. Combine the following scenarios:
   1. Open the dev console with path / or path /topology/ns/your-namespaceX
   2. Switch between the namespaces
   3. Favorite a namespace, have no favorited namespace

Actual results:

When the user favorited a namespace this namespace was not automatically opened when the user opens the console with path /.

Expected results:

When open the console with path / the favorited namespace should be opened. If there is no favorited namespace the last opened namespace should be reopened.

Reproducibility (Always/Intermittent/Only Once):

Always

Build Details:

4.7.0-0.ci-2020-12-09-050309

Additional info:

None