Extensions View does not update as expected about theia

[msujew]

Probably a regression from #13138.

[xai]

Probably a regression from #13138.

It is, yes. I bisected it down to that. Commits prior to that do not have the issue.
We are having some dependency injection issues here. It also happens in the browser example, which also produces respective frontend logs indicating binding problems.

The first one is in

theia/packages/plugin-ext/src/hosted/browser/worker/worker-main.ts

Line 59 in b15b639

const rpc: RPCProtocol = container.get(RPCProtocolImpl);

where RPCProtocolImpl instead of RPCProtocol is used (Christian spotted that yesterday),
but there is more. Currently, I have trouble with the binding of MinimalTerminalServiceExt.

[xai]

Okay, apparently, dependency injection issues are not the only reason for this. I started a draft PR that resolves the DI-related issues, but the bug is still present.

[cdamus]

The crux of the problem was that the Headless Plugins refactoring lost the forwarding of onDidDeploy() events from the frontend HostedPluginSupport to the HostedPluginWatcher. With that restored, the issue seems to be resolved.