As a Watchlist Expiry user, I want to be able to temporarily watch items via Rollback, so that I can access the same feature when using such functionality.

Acceptance Criteria:

• Implement support for watchlist expiry drop-down in Rollback
  • A new label to the right (or above, depending on particular UI) of watch upon rollback checkbox: "Watchlist time period:"
  • A drop-down to the right of label (inactive by default, before box checked)
• When user checks the box to "Watch this page," the drop-down should become active
• The user should be able to select watch period via drop-down
  • The drop-down has the following options:
    • Permanent (as default)
    • for 1 week
    • for 1 month
    • for 3 months
    • for 6 months
• If the page has already been watched, the behavior should be as follows:
  • Drop-down should have days left as pre-selected option at top
  • The selection should be written as follows: "X days left" (for example, "10 days left" or "20 days left").
• If the page has already been watched with a selected temporary time period, and the user clicks "Publish" without changing the time period selection, no changes to the watch period should be made.
• The watch period should be saved or updated, if the user makes a new time period selection.

Visual Examples of how drop-downs should appear:

Visual Examples of pages that we will update with new drop-downs: