Refactoring II.

- Filter by date range
- SyncUpdate tasks run fully asynchronous in background
- Move tableView manipulations into FilterPipelineDelegate
- Move SyncUpdate notification into SyncUpdateDelegate
- Fix: sync cache before persisting a recording
- Restructuring GroupedDomainDataSource
- Performance: db logs queries use rowids instead of timestamps
- Add 'now' button to DatePickerAlert

main/Settings/TVCSettings.swift

@@ -42,10 +42,7 @@ class TVCSettings: UITableViewController {
 			"You are about to delete all results that have been logged in the past. " +
 			"Your preferences for blocked and ignored domains are preserved.\n" +
 			"Continue?", buttonText: "Delete", buttonStyle: .destructive) { _ in
-				DispatchQueue.global().async {
-					try? AppDB?.dnsLogsDeleteAll()
-					NotifyLogHistoryReset.postAsyncMain()
-				}
+				TheGreatDestroyer.deleteAllLogs()
 		}.presentIn(self)
 	}