Various style improvements and fixes

- more documentation
- up to date screenshots
- SonarLint suggestions
3 jobs for master in 3 minutes and 54 seconds (queued for 5 seconds)
Status Name Job ID Coverage
  Build
passed build #509632

00:00:15

 
  Test
passed test #509633

00:00:15

96.8481%
 
  Package
passed package #509634

00:03:23