Automatically add label after scraping / label rules

[Ashutosh-Kukreti]

Dear MediaElch team,

1. Whenever I mark any movie or show as watched I've to manually highlight or label it. Please add support for automatic labeling or highlighting of the media.
2. It'll be very helpful if there's a dark theme available for the interface.
3. A thumbnail view (like calibre ebook) instead of list view will be helpful in navigating the media.
4. An option to play movie or show from within the app will be very helpful for users who use MediaElch for managing their movies and shows and do not use kodi.