Display preview state and version info in PSIC startup banner

[rkeithhill]

PR Summary

Adds preview status and version info to the PSIC startup banner. The info comes from the extension (not PSES).

Fix #2643

PR Checklist

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[rkeithhill]

Question - I did not adjust the leading whitespace for the additional text. It occurs to me know that maybe that leading whitespace is to make the banner "somewhat" centered. If that was the intent, should I "reduce" the amount of whitespace for the extra characters?

[TylerLeonhardt]

I think it would be a good idea to adjust the whitespace a bit. We had some complaints in the past that it's too far to the right anyway...

[rkeithhill]

RE adjusting whitespace. Which of these four do you like? 1 is the original. 2 has four spaces removed from leading whitespace. 3 has no leading whitespace. 4 has no leading whitespace and gets rid of one newline above and one newline below (still leaving one newline above and below).

One more, make this #5 (no blank line before, one blank line after):

[TylerLeonhardt]

I like number 2!

[rkeithhill]

Looking at some other repls:

I prefer #5. But I'll go with whatever @TylerLeonhardt and @rjmholt want.

[TylerLeonhardt]

I'm fine with number 5 too. If we get rid of all the whitespace - no one can complain that there's too much :)

[TylerLeonhardt]

LGTM

[rjmholt]

Love it!