[Feature Request] Ability to save and load custom date ranges

[Julihofl]

Overview

I think an option to save a custom date range and giving it a name would greatly improve your already awesome app.

Detailed

• I'd love to be able to save some custom date ranges like "2023", "2022", etc. to be able to quickly view the stats for the whole year.
• The ability to rename and delete these saved date ranges would also be great.
• Maybe it would be possible to edit the predefined date ranges on the left and save new date ranges to this view.