App view enhancements and fixes

[Abawell]

Enhancements and fixes to the App tab.

• The app picker order changed each time it was opened. Now it is sorted
• The app picker displayed only the app bundle ids. Now it displays the app icon and the app name too.
• Some app icons couldn't be found because CFBundleIconFiles was not checked. Some applications like Contacts still don't have an icon because it is in an encrypted file. In this case, a blank icon is displayed.
• The "Show system app" button is moved to the right so that it is no longer crushed when the window is resized.
• The icon is moved under the picker.
• App information wasn't updated when a system app was selected and the "Show system apps" was unchecked.
• Labels are added to the version and build number.
• The app list is now empty when a non-booted device is selected.
• The "Open data folder" is now disabled when the url is not available (Photos, Settings...)
• The "Uninstall app" is now disabled for system apps.

[twostraws]

Wow! What an awesome first-time contribution – thank you very much! 🙌