Improvements to logging (#457)

* Use `.info` logging in most places.
* Remove old objc logging support.
* Fix table view controller.
* Make sure timeline item content isn't logged.
* Add tests.

ElementX/Sources/Services/Room/RoomSummary/RoomSummaryProvider.swift

@@ -83,7 +83,7 @@ class RoomSummaryProvider: RoomSummaryProviderProtocol {
         MXLog.verbose("Updating \(identifiers.count) rooms")
         
         guard statePublisher.value == .live else {
-            MXLog.verbose("Sliding sync not live yet, ignoring.")
+            MXLog.warning("Sliding sync not live yet, ignoring update.")
             return
         }