[web] Raffle design update

[jonxuxu]

Ticket	Title
fixes #80	[web] Move buy button on giveaways page
fixes #79	[web] Dashboard cosmetic upgrades

Description

Fixes everything requested in the aforementioned issues. The only difference being that the purchase UI is different from #80 in that the cards themselves are now buy buttons, as shown below:

Screenshots

Checklist

• [x] Appropriate Unit test coverage
• [x] Manual top-hatting has been performed
• [x] This PR is linted, tested and follows the best practices of the organization

[sqphoenix]

This looks good to me. The cosmetic changes requested are all present.