adding in local time on the prefernce page for digest schedules

[bwebs]

Description

Allows updated digest schedules that are returning the start key to display in local time calculated by the browser.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

❗ No coverage uploaded for pull request base (main@814401d). Click here to learn what that means.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #546   +/-   ##
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  Coverage        ?   35.95%           
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  Files           ?       70           
  Lines           ?     1196           
  Branches        ?      365           
=======================================
  Hits            ?      430           
  Misses          ?      766           
  Partials        ?        0           

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