Keep the state of the search field and scroll position after returning from the underlying screen

### Details

Would be useful to preserve the state of the search field and scroll position on certain screens after returning from the underlying screens.

Based on the feature request #4658

### List of the screens

Both scroll and search:
- App management
- Apps operating through proxy
- Proxy server
- Filters
- Quick actions (Firewall module)
- Apps (Statistics tab)
- Companies (Statistics tab)

Only scroll position:
- Filter screens by category (Ad filters/Privacy filters etc.)
- Userscripts
- Tracking protection screen
- Other ad blocking filters
- Other privacy filters
- Other annoyance filters
- DNS server
- DNS filters
- Custom firewall rules
- Statistics tab