Add Solana tokens (SPL)

[sneurlax]

WIP

• [x] Sending
• [x] Desktop UI (except for tx history)
• [x] Balance refresh
• [x] Price history
• [x] Sol token price fetching
• [ ] Replace default sol token list with dynamic lookup from some api
• [ ] ATA display
• [ ] Transaction history
• [ ] Mobile UI (WIP)
• [ ] more (TODO list rest of the TODOs)