Jetpack Plugins: widow on "all plugins up to date" message

[v18]

We should keep the last 2 words together, so that there's never a single word on a line of its own:

Ideally, we'd have some standardized component/utility that we could just call on any string to avoid this, anywhere within Calypso.

Two suggestions for how this could be done:

1. inject an   between the last 2 words in a string.
2. Use a span with white-space: nowrap for the last two words: