Improve information about the level of support of extensions

Hey everyone, quick update on this one:

I did an updated one with the word “paid” indicating the requirement for a particular plan. This has the advantage of being more direct and localizable, however we use more space for it.

I adjusted the colors to follow the theme with the following rules:
Popup background: @body-bg
Link: @link-color
Plan background: the same from alert-info (I didn’t find the LESS variable)

Take a look at the updated proposal below, I tried to make a single entry when that’s the case.

Also, all plan links now show the standard external link icon, to better suit their function.

Updated images

On E.M.

E.X.O.