Steps to reproduce:

• Create new dashboard
• Edit the dashboard
• Add top hosts widget column with numeric item
• Check 'time period' selector state

Result: 'Time period' (zi-clock element) selection is active while dashboard edit state is on.
See video attachment:

Expected: 'Time period' selector should be disabled, since top hosts column(s) doesn't use "Time period" => "Dashboard" option and there is no other widget on dashboard with such option.