Errors in "Icons in list view"

[fritzmg]

The "Icons in list view" section under https://docs.contao.org/manual/en/administration-area/list-data-records/#icons-in-list-view has some errors:

• Not all icons are listed.
• Edit settings is listed twice, but with wrong icons (I assume one was meant for the parent settings and one for "view children" - while for Contao 5 the icons have been changed).

Generally the icons also need to be overhauled for Contao 5.5+