update progressCell for bolus display for tidepool-merge

[marionbarker]

Purpose:

This PR fixes an intermittent bolus progress display error reported in these issues

• Auto bolus is giving a different amount than it shows in the UI #2196
• Total amount of bolus being delivered is incorrect in HUD #2195
• [Dev] UI glitch for X of Y Bolus delivered #2109

@itsmojo identified root cause for this intermittent display error and passed on a proposed fix for the main branch.

If a bolus progress is being displayed when the app is put into background and then the app is opened in the middle of a bolus, the progress bar shows a stale value of the expected total units; the stale value is the total units from the last time the bolus progress bar was displayed.

I tested the tidepool-merge build using this test method and showed the intermittent display error occurs with tidepool-merge as well as main. The fix from @itsmojo was modified to work with the new tidepool-merge version of the Loop/View Controllers/StatusTableViewController.swift file.

Test

This PR was applied to tidepool-merge. The same test method mentioned above was used and every instance of opening the app in the middle of a bolus showed the correct value for the total bolus units.

[ps2]

LGTM!