Scan buttons are confusing

[lashchev]

Is your feature request related to a problem? Please describe. Current Scann buttons could be clearer. If I scan photos, I never want to add a page. If I scan a document, I need to add a page until I start scanning a new document. "Scan and start fresh" is confusing because it actually does "Start fresh and scan".

Describe the solution you'd like

1. Have separate buttons (not a pull-down): <New Scan>, <Add a page>
2. If <New Scan> is pressed and something was already scanned, edited and not saved- ask to save or discard the current scan.