return clock icon when isClockOffset is true - fix for tidepool-merge

[marionbarker]

Using the other PumpManager+UI code as a template, add the clock icon for the main screen when using Eros pods and the pod time zone does not match the phone time zone.

[marionbarker]

Tested on 2 phones: iOS 18.1 and iOS 16.7.10.

• iOS 18.1 phone, attached an Eros pod with rileylink but did not connect a pod. Was still able to modify phone time, observe the clock icon on the main screen and resolve this by changing pod time (which does not require a pod to be connected)
• iOS 16.7.10 phone has an actual Eros pod connected. Changed time zone on phone, got the clock icon on main screen, updated time; message on pod screen and clock icon on main screen no longer seen. Then reversed the process. All worked as expected.

[marionbarker]

This was merged into main branch with PR #46. Closing this one as it is expected that main will get merged into tidepool-merge.