Hide chart order setup UI promptly

[jackhai9]

Summary

• close the native chart order popover as soon as its checkbox state is confirmed
• keep delayed TradingView drawing saves coalesced after the popover starts closing
• preserve final chart snapshots when popover closing fails

Validation

• npm test (406 passed)
• npm run test:ui (58 passed)
• npm run build:binance-orderbook-trade
• npm run check:binance-orderbook-trade
• git diff --check
• independent read-only review: pass