Make switching accounts easy

It will need https://gitlab.com/gitlab-org/gitlab-ce/issues/30484 to be finished first

Problem

There is no easy way of switching profiles within gitlab.

Proposal

Create a similar functionality as how google does this.

Group

  • Add account option
  • Accounts are displayed under each other, when clicked on switch account

Value

Easier switching of account, based on cookie (if i am correct)

Related issues

https://gitlab.com/gitlab-org/gitlab-ce/issues/30484

CC/Call to actions

@alfredo1 @tauriedavis @victorwu @JobV (how hard will this be, what priority can we give this?)