v2 - Staking

[mezuny]

• [x] Graph needs fixing (small graph)
• [x] View on Graph doesn't work
• [x] Dropdown is missing some styling / spacing, and arrow is pushed out to the right
• [x] Claim button needs to be restyled
• [x] Upcoming Epochs all show 427, rather than 427, 428, 429
• [x] 'Grouped' elements need to be turned in to components to be used in multiple places (StakingCard, Pool List, Upcoming and historical staking)

[spward]

• [x] Epoch Date for View on Graph
• [x] Styling on Rewards Dropdown
• [ ] Translations for other languages

Edit: English completed

[spward]

The epochs data needs to be updated, assume they are currently only set to currentEpoch