* Disable saving of decks when the deck is empty
* Replace tabs with spaces to conform with coding conventions
* Remove whitespace at end of line to satisfy the CI robot overlords
* Improve logic to check if deck is empty, fix functionality when a deck is loaded
* Fix code style issues
* Disable more menus when the deck is empty
* Streamline code for disabling save menus when the deck is empty
* Fix save-disabling when loading a deck from the clipboard
* Enable saving deck directly after loading deck
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