Trading View enhancements

[clockworkgr]

Holding issue to group TV enhancements.

Current requests:

• [ ] Settings persistence https://github.com/bitshares/bitshares-ui/issues/2472
• [ ] Pine scripts https://github.com/bitshares/bitshares-ui/issues/1714 ,https://github.com/bitshares/bitshares-ui/issues/2421
• [ ] Alerts https://github.com/bitshares/bitshares-ui/issues/2346 (semi-related, could be done with or without using TV functionality)
• [ ] Tradingview chart - full access to scale properties - #2494
• [ ] Exchange Enhancement - Rebuild the price chart - #2493
• [ ] Price Alert Enhancement - Sent alerts to Beet #2491

[froooze]

Can you add #1669?