Behavior of space switcher in new IA is not well defined

[christianvogt]

There are two scenarios where we need to clarify the behavior of the space dropdown menu:

1. within the context of a space owned by the current user eg. /christian/space1/create/pipelines
2. within the context of a space owned by another user eg. /otheruser/space2/create/pipelines

On prod-preview today, the space dropdown always shows the spaces of the user in context. Which means if I am visiting the space of another user, the dropdown shows all of their spaces but none of the spaces I own. Therefore it makes it difficult to navigate back to to start viewing my spaces again.

Also, when the context is the current user, the drop down shows all spaces they own and collaborate on. When the context is another user, the drop down shows only spaces owned by the other user.

Suggested behavior within the context of (1):

My spaces: <-- option group
  - All Spaces
  - my owned space 1
  - my owned space 2
  - space I collaborate on 1
  - space I collaborate on 2

Suggested behavior within the context of (2):

My spaces: <-- option group
  - All Spaces
  - my owned space 1
  - my owned space 2
  - space I collaborate on 1
  - space I collaborate on 2
<Username>'s Spaces: <-- option group
   - All Spaces
   - other user owned space 1
   - other user owned space 2

We also lost the ability to quickly switch to a recent space other than going to the overview page and selecting All Spaces. Perhaps adding a list of recent spaces to this dropdown would be helpful?

@openshiftio/uxd-team @serenamarie125