Charting. OptionPositionChart. Legend binding fix.

Charting. Options charts theme binding fix.

Author: mikasoukhov

References/StockSharp.Xaml.Charting.dll

@@ -17,6 +17,8 @@ StockSharp API Change log
 * (bug) Charting. Fix auto select appropriate candle series.
 * (bug) FIX connector. Fix process unknown outgoing messages.
 * (bug) AlfaDirect, Transaq. PortfolioMessage processing fixes.
+* (bug) Charting. OptionPositionChart. Legend binding fix.
+* (bug) Charting. Options charts theme binding fix.
 
 ## v4.4.6:
 * (feature) Binance, Liqui, CEX.IO, Cryptopia, OKEx, BitMEX, YoBit, Livecoin, EXMO, Deribit, Huobi, Kucoin, BITEXBOOK, CoinExchange stubs.