Improve usability of Smart Start and filters

This MR contains two changes:

• When Smart Start loads, the primary filter buttons are now hidden. (#253)
• When Smart Start submits, the All Filters sidebar opens automatically. (#256)

Testing:

1. On main, go to Explore with Smart Start enabled
2. ❌ Note that whatever primary filter buttons are enabled on your setup appear below the Smart Start text entry field
3. Submit a Smart Start search
4. ❌ Note that All Filters remains closed
5. Switch to this branch and repeat
6. ✅ Note that the primary filter buttons no longer appear
7. ✅ Note that after submitting a Smart Start search -- or when loading the page with a search prefilled, e.g. from a bookmark or shared URL with the smartFilter query param -- that All Filters opens automatically

Closes https://code.librehq.com/ots/clients/lfc/torque-tracker/-/issues/253 Closes https://code.librehq.com/ots/clients/lfc/torque-tracker/-/issues/256