Fix a couple first-run startup bugs.

Frameworks/Account/Account.swift

@@ -672,7 +672,9 @@ private extension Account {
 		do {
 			fileData = try Data(contentsOf: opmlFileURL)
 		} catch {
-			NSApplication.shared.presentError(error)
+			// Commented out because it’s not an error on first run.
+			// TODO: make it so we know if it’s first run or not.
+			//NSApplication.shared.presentError(error)
 			return
 		}
 		guard let opmlData = fileData else {
@@ -811,6 +813,8 @@ private extension Account {
 		database.fetchAllNonZeroUnreadCounts { (unreadCountDictionary) in
 
 			if unreadCountDictionary.isEmpty {
+				self.fetchingAllUnreadCounts = false
+				self.updateUnreadCount()
 				return
 			}
 

Importers/DefaultFeedsImporter.swift

@@ -45,13 +45,9 @@ struct FeedsImporter {
 		let feedsToImport = feeds(with: feedDictionaries, account: account)
 		
 		BatchUpdate.shared.perform {
-			for feed in feedsToImport {
-				if !account.hasFeed(with: feed.feedID) {
-					account.addFeed(feed, to: nil)
-				}
-			}
+			feedsToImport.forEach{ account.addFeed($0, to: nil) }
 		}
-		account.dirty = true
+		account.structureDidChange()
 	}
 	
 	private static func feeds(with feedDictionaries: [DiskFeedDictionary], account: Account) -> Set<Feed> {