Make Transport callbacks run on the main thread, which is consistent with NetNewsWire’s general pattern for these types of callbacks. This helps avoid situations where we touch model objects (which are main-thread-only) on a background thread.

Frameworks/Account/Feedbin/FeedbinAccountDelegate.swift

@@ -816,9 +816,7 @@ private extension FeedbinAccountDelegate {
 		for feed in account.flattenedFeeds() {
 			for (key, value) in iconDict {
 				if feed.homePageURL?.contains(key) ?? false {
-					DispatchQueue.main.sync {
-						feed.faviconURL = value
-					}
+					feed.faviconURL = value
 					break
 				}
 			}