Well even though it seems easy everything in linux just wont let you do it the easy way... just because of the fun irritating you like you don't have anything else to do in your life better than trying all the way to solve things that should work.
So, there goes lying unerneath 2 questions about dockers.
1) I suppose the first step to let you delete it is the Docker not running ok logical and understandable. Let's deep a little more and think that if they have directories shared using maybe the have to de attached somehow from those directories (Not only delete the whole directory with data but still refused to be deleted). What else need to be done in order to let you simply press the remove button and delete it as plugins do????? It gives a warning each time that can't delete a usr/bin ... something directory.
2)In Dockers there is the Docker Images and Docker Containers pane.... If I want to modify something afterwards which pane do I use and why when
I click modify the Docker Containers many of the options I have set are lost (which warns me before I enter its going to happen - <<please
be aware that all non-persistent data within the container will be deleted)????