[Feature]: improve usability of Scanner

[Imajicus]

Description

There are so many button presses necessary to scan only one single document page: plus, take photo, crop, accept. This should be simplified somehow. What also contributes to the problem is that the buttons are scattered all over the display, e.g. Accept at the top, the rest scattered at the bottom. At least these buttons for the subsequent steps should be in the same place so that you can click through quickly without having to think too much. If you scan 100 pages at a time, you will quickly realize how inefficient the operation is. Please improve this. Thank you.