Make block icons more specific to the blocks

[kienstra]

Request For Code Review

Hi @miina, Could you please review this pull request, which changes the block icons?

[postphotos]

Oh, the palm tree is cute! Kinda want to travel now. 🥇 Nice work, @kienstra! Do you think we should give this to a designer, too, maybe @jwold or someone else at a future date?

[kienstra]

Thanks, @postphotos. It'd be nice to have a designer for the icons eventually.

[jwold]

I think that's a great idea to play with the icons. These are good for now :)

Are we limited to dashicons, or can we use anything?

[miina]

Hey @jwold, we can use custom icons, too, not only dashicons.