Problems with filtering by date

Hi eikek,

I found a small issue: When I know the exact date of some item and filter e.g. from=2022-05-27 and to=2022-05-27 I get no results. It seems to is `<` while from is `>=`.

Also I seemingly can't paste into the datetime boxes. When the textbox loses focus it's cleared. The filter seems to keep applied at least partially though as the document count does update.

I'm still amazed by docspell and the latest features make it even more usable (e.g. the new dashboard).