Some improvements for this Extensions

[nicumicle]

I've added some improvements to this extension:

• Add a new option for "Stop and Remove": Sometimes, I want to remove a container that is already started. So, instead of clicking on stop and then on remove, we have this new option "stop and remove";
• Sort container names: When there are a lot of containers, it is kind of hard to find the one you want. I think if the container names are sorted, it is easier to find them;
• Add --force when removing a container;
• Display gray color when the status is undefined;

[nicumicle]

Hello @gpouilloux ,

I did the changes you requested.

Please have another look at this PR.