[Calendar] Empty note pages

Describe the bug Blank note pages are not displayed as dots, so it can happen that one dot appears instead of three because the first two pages are blank and only the third has writing.

To Reproduce Steps to reproduce the behavior:

1. Go to the notes view
2. Write on three note pages
3. Delete the content of the first two pages
4. See the issue

Expected behavior The page number of the last non-blank page should be shown as dots and the entire page should be deleted and one subtracted from the page number of the following pages.

Screenshots

Device details:

• Device: -
• OS: -
• Version: 1.5.9-xx

Additional context