More customisation and deck name in status

Config is now split into 2 categories - main, statuses. All of the previous settings were moved to the main category.
There will be a pop-up asking you to go and restore the default config.

1 new main setting

• deck_name: Display deck name next to "Daily reviews" when reviewing (will be on by default)
  Daily reviews [<deck name>]
  Thank you @hayasaka-azumi for the suggestion (or motivation to finally implement it haha).

5 new status settings

• menu_status: Text to display when in menu (Slacking off)
• reviewing_status: Text to display when reviewing (Daily reviews)
• browsing_status: Text to display when browsing decks/cards (Browsing decks)
• editing_status: Text to display when editing/adding cards (Adding cards)
• no_cards_left_txt: (Only works if card_count is on) Text to display when number of cards left to study/review is 0 (No cards left)