Anki add-on: Custom Default Ease (4 Buttons)

This add-on will modify answers default easy type, usually you can set with 2-Hard/3-Good/4-Easy default ease type for separately new/learn/review card; further more you can set twice ease type for learn and review card, such as set 2-Hard type and second select 3-Good type for the learn card or review card, because this add-on try to check if this card is first learning or first review, so it can try to custom the default ease by card's status. This add-on also can colorized the default ease button, through with type of the card's queue: new/learning/review, the default easy button show the same colour with the queue's count number. BTW, this change may be conflict with other add-on such as "Advanced Review Bottom Bar" which modify the answer buttons, so you can change the config of 'Colorize default ease' to disable. This add-on support general setting and deck's setting. You can change the general setting and default deck's setting at this add-on's config window though tool's menu; and can change the deck's setting at the deck's options config page, just like anki's native option adapt to different deck's profile.