Added new strings to handle overdue payments

[da2x]

Test Plan:

• Create a new wallet
• Stop browser
• Set reconcileStamp ledger-state.json to the current timestamp or more than a day in the past.
• Verify that the text indicates "is due" an "is coverdue" instead of suggesting a future event.

Original issue description

• “Your first contribution will be 24 days ago.”
• “Your next contribution will be 18 days ago.”

So these need to be modified to handle the correct tense when payment is overdue. I’m uncertain about any localization implications this may have or how this should be best handled. Pull request #7077 handles a related string, but not this issue.

[bsclifton]

Note to testers:

UI will change with #7532 which invalidates part of this PR. See notes from discussion in the PR that fixes this issue: #7524 (comment)