UX Improvement: Add instant search to Sidebar

[niklas-wortmann]

To make is easy to find special operators, there should be an instant search on top of the operator list in the sidebar.

[niklas-wortmann]

I would like to implement this one this weekend.
@knittingcodemonkey is there something I have to mind to make such a searchbar accessible? thank you!

[jotatoledo]

Personally I dont think it would be a good idea to make the filtering in the sidenav.

IMO the sidenav content should be static. A search bar could be built in the main toolbar, on input events do either:

• Main router outlet displays view mapped to path root/search?q=${input}. View renders search list. On click of element navigate to root/operators/${operator}`
• Display floating autocomplete list connected to the input field. On click of list element navigate to root/operators/${operator}