Dashboards: board widgets lose their filter

Example to reproduce:

- Install CRM with the demo data
- Go to Sales > Leads
- Filter on "abc" (shouldn't match anything) and add to dashboard (via the search box options)
- Clear your filter, create a new one on "need" (should match several elements from the demo data) and add to dashboard
- Go to Reporting > My Dashboard: you should see your two boards ("abc" and "need")

Once you are there, pretty much any interaction with the UI will make your boards lose their filter: drag'n'drop an element, change the layout, delete on of the elements. The boards will display without applying any filter.