keep filter settings between page navigation

[BernhardAuer]

Data Filter is set with custom values
When users navigates to other page with same data filter option, those same custom user option should be kept

[BernhardAuer]

right now buggy, because proper shallow routing is needed for chosen implementation via URL page store. Right now (sveltekit1), the page store is not updated on url changes, therefore links with outdated data filter values remain in navbar....

on hold till svelteKit2 update + shallowRouting fix