Maybe fix crash due to reading ScaledMetric on background thread

ScaledMetric.wrappedValue calls into Font.scaleFactor(textStyle:in:)
which uses a dictionary setter

Tusker/Views/AccountDisplayNameView.swift

@@ -38,6 +38,7 @@ struct AccountDisplayNameView: View {
         let matches = emojiRegex.matches(in: account.displayName, options: [], range: fullRange)
         guard !matches.isEmpty else { return }
         
+        let emojiSize = self.emojiSize
         let emojiImages = MultiThreadDictionary<String, Image>()
         
         let group = DispatchGroup()