Review excluded blank pages

[zwo1a]

Is your feature request related to a problem? Please describe. When scanning mixed single and double-sided documents, they can contain many blank pages. We need to delete them manually.

Describe the solution you'd like

1. ~~The program scans automatically determines if a page is blank and excludes it.~~ (This feature already exists)
2. The program flags blank pages and leaves it up to the user to determine whether or not to delete them.
3. The program saves blank pages to a separate folder so that the user can subsequently recover pages that may be useful. (Add some symbols and numbers after the serial number to allow for sorting using the file name, e.g. a blank page following 100 pages is labeled 100-blank01.)

Describe alternatives you've considered Delete them manually in NAPS2; Save first, then sort by file size to identify possible blank pages and delete them manually.

Additional context N/A