Date filtering feature does not work

[ilyanoskov]

Dear Maintainers,

I have posted this issue here, double posting for visibility: Kanaries/pygwalker#256

I have also found that when using derived data points (like create a Year field from timestamp), then it cannot be placed into the filter and the entire app hangs. So it's impossible to select any date range at the moment.

Could you please fix the date filtering functionality? Thank you very much in advance.