Feature Request: Change or configure Day/Month scrolling shortcut

[quekyufei]

It would be great to be able to scroll through the days of the month with the Arrow Keys, and scroll through the month/year with Shift-Arrow Keys.

Personally I would rarely have to scroll through months (◀ ▶) and practically never scroll through years (▲ ▼), but would much more often scroll through the days (⇧◀ ⇧▶ ⇧▲ ⇧▼ ). I am aware of the H, J, K, L shortcuts but it seems to make much more sense for it to be on the arrow keys.

It would be great to change scrolling by days to just Arrow Keys and scrolling by month/year to the ⇧ key variants, or to introduce a way to configure the shortcuts.

Thank you for the great work!