fix(ReadOnly): bring read only mode back!

[ramfox]

closes #429 closes #400

We need read only mode for our future app.qri.io webapp

This PR brings readonly mode back up to speed:

• Allows the /network endpoint (Network component) to be shown, which will fetch datasets from the registry
• fixes formatting issues and spreads sessionProfile to components that were missing it (the big one being the Editor component)
• Update language in ReadOnly and ReadOnlyBody components
• Removes links to profiles in read only mode, for now
• fixes search!