Make it easier to restart a remote session from desktop JetBrains

[loujaybee]

When using JetBrains, the user typically goes to Gitpod, opens a workspace and is prompted to use JetBrains, and opens their changes on their local machine to make edits. However, if you go away and come back, the workspace will have closed, and it might not be transparent to the user about the best way to restart their session, regain their code and continue working.

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I don't have a particular solution in mind, we could potentially enable this workflow via the local companion app, to list the running workspaces and tab through to restart, we could do it via a command in the palette on the local JetBrains, or provide better pop-up notifications to re-establish the remote session.

Similar to this issue #6672 for VS Code.

Also related: #6602

[loujaybee]

This is somewhat dependent on removing Code With Me: #5644

Let's wait until that work is done, before picking this up.

[stale]

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