1. Clear ignoreNextConfirmRelease after transferring state to child
activity, so the next Confirm press isn't silently consumed.
2. Add conditional FOOTNOTES entry to reader menu when the current
book has footnotes.
3. Guard clock-minute requestUpdate() with !isReaderActivity() to
prevent full e-ink re-renders every minute while reading.
Made-with: Cursor
422cad7bc5
