Improve lisibility of explorer

Thank you for your interest in helping out.

There's a correction that needs to take place however.

This is changing CSS indentation which goes against formatting guidelines (2 spaces).

https://www.drupal.org/docs/develop/standards/css/css-formatting-guidelines →

Anjali Mehta → made their first commit to this issue’s fork.

@Anjali, based on your initial comment about unnecesary groups I came up with the idea to use the grouping attribute of an SDC and instead the tree now is built using that grouping. This allowed me to simplify the structure.

The CSS has been updated so that that it overrides some of the styles that the rendering theme is using, however, the theme always has capabilities to change those. In general readability should be improved, but let me know your thoughts.

These updates have made your MR to have conflicts though.

Please raise a new issue if you find any problems.

alemadlei → closed merge request !4