Show Dashboard header in the header area for multi-enterprise users

[drummer83]

What? Why?

• Closes a minor issue from this testing document:
  https://docs.google.com/document/d/1YoAoAbdXx2z3q2FfNlWD_aRvNa5C9SKX_NSfABoM42g/edit

For multi-enterprise users the header 'Dashboard' on the dashboard page was shown below the header area and not inside of it. This should be fixed now.

Before:

After:

What should we test?

• Make sure have multiple (at least two) enterprises.
• Visit the overview page /admin.
• Check the position of the header 'Dashboard'.
• It should be inside the light blue header area (same vertical position as the link to the user guide).

Release notes

Changelog Category (reviewers may add a label for the release notes):

• User facing changes
• API changes (V0, V1, DFC or Webhook)
• Technical changes only
• Feature toggled

The title of the pull request will be included in the release notes.

Dependencies

Documentation updates

[dacook]

Great fix, thank you! I wonder why it was done that way in the first place..

[mkllnk]

Perfect.

[RachL]

Before :

After:

LGTM! merging :-)