Redesign third party extensions table

[mondeja]

Kind of issue

• Feature
• Bug
• Design
• Other, namely:

Description

The third party extensions table is now a bit unusable because the third party extensions have grown a lot. We definitely need scrolling.

Also seems to me that the even-odd contrast change is too much aggresive.

I want to propose too to add the icon before the extension name, but for that we need to extract the icon slug from the link in the main repo utils.js file. Thinking on something like: