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/Screens/EmojiPickerScreen/EmojiPickerScreenCoordinator.swift

@@ -41,7 +41,7 @@ final class EmojiPickerScreenCoordinator: CoordinatorProtocol {
     func start() {
         viewModel.callback = { [weak self] action in
             guard let self else { return }
-            MXLog.debug("EmojiPickerScreenViewModel did complete with result: \(action).")
+            
             switch action {
             case let .emojiSelected(emoji: emoji):
                 self.callback?(.emojiSelected(emoji: emoji, itemId: self.parameters.itemId))