Add arquillian support dialog is too bare-bones

Using Configure Arquillian Support just asks if I want to add Arquillian support + link to global arquillian settings.

Following thing should be done IMO,

A) When saying yes, it should preview what changes are going to happen (changing pom.xml by default)

B) I should be able to say no, don't change pom, and just have arquillian nature added (i.e. assume the classpath contain what is needed, warn if possible problems) - optimally not require Maven to be on the project.

C) On the "next" page let user configure the settings he wish applied (now I have to go to global preferences first and change those which might not be what one wants)