* allow our users to disconnect provider identities from their accounts
* when a user tries to connect with a provider, for which there is already a connection to anther account, we redirect to an assistance page. a summary should help to review both accounts. in the end, any user may decide to move to a single account by disconnecting the provider identities from the other account.
this way we can guarantee to not automagically lock out users from accounts with subscriptions or any meaningful data.
* show `Connected as`
* update terms renderer
Signed-off-by: Alex Tugarev <alex@gitpod.io>
