Add empty states during page reload

[EwelinaSkrzypacz]

When user clicks on link (for example from chat) like:

https://meetup.legnica.pl/#poprzednieMeetupy

the page not always scrolls to the section. It follows that the page has not yet had time to load, so we should add some empty states - I mean something like https://tailwindcss.com/docs/animation#pulse