Improve font size, underlining, other, in plugin sidebar

[StevenDufresne]

Reported by @jasmussen.

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The plugin sidebar could use some small improvements:

Ideally we can get a bit closer in colors, font sizes, line-heights, etc, to this example from the Learn refresh:

Specifically:

• 16px font size if possible.
• can we avoid the : ? (I.e. "Version" instead of "Version:").
• Can we change to sentence case across (i.e. “WordPress version” and “PHP version”).
• Should the links all be underlined?

Related, this part of the sidebar:

A few things:

• Should “Add my review”, “View support forum” and “Donate” buttons be underlined links instead?
• Can we remove the > from the “See all”, and have it be 16px and underlined?
• Can we add a 2px radius to the rating bars?

[StevenDufresne]

Should “Add my review”, “View support forum” and “Donate” buttons be underlined links instead?
Should the links all be underlined?

Fixed in #263.

Can we remove the > from the “See all”, and have it be 16px and underlined?

Done in https://meta.trac.wordpress.org/changeset/13682

Can we add a 2px radius to the rating bars?

Let's open a new ticket for this as it moves across different themes.