Show release notes info message after every update

[joaomoreno]

@bgse says:

@egamma This might be a psychology thing. I guess when the update notification comes up, users can get a bit excited about new toys, and the obvious thing to do is to hit that update button asap.

Maybe it would be a good idea to display the release notes notification again once the user starts the updated VSCode for the first time.

E.g. "Visual Studio Code was recently updated. Do you want to read release notes now", offering options like "Release Notes", "Not now", "Do not ask again".

cc @pcgeek86 @egamma

[chrisdias]

perhaps we open browser after upgrade, same way we do for first time download.

[pcgeek86]

@chrisdias Please no. I hate it when applications open pages in web browsers. The experience needs to be more integrated. /cc @joaomoreno

[joaomoreno]

I think the message service will do just fine.

[joaomoreno]