Extensions view redesign

[isidorn]

We have already quickly discussed this, but creating the issue so we can track this work for the future.

Extensions view UI deserves a UI face lift. Here's some thoughts:

• We might need a way to show extension specific msgs in there. We do not want to use notifications. Example msgs: "you have 2 deprecated extensions", "you have been using this extension happily, consider sponsoring or rating it", "this extension has an update" - Explore Extensions Management notification center #159889
• Extension item size is too small. We should not show that many search results Extension item height could be larger #150449
• How to show ML recommended extensions
• Are all the details really needed? For example should we show activation time only if it is above a certain threshold?
• Are all the menu entries really needed? Some menus got pretty complex (example filter menu) Should we surface some other action instead?

fyi @chrisdias @digitarald

[miguelsolorio]

Don't think we'll have time for it in this iteration but likely in the next, moving to July

[isidorn]

@misolori thanks, there's no rush here.