Refactor action strings

[kasperg]

There seem to be a lot of nearly duplicated stings for an action:

• Description
• Shortname
• Run message
• Killswitch
• Error message

See for example Apache2 restart.

I think it would be nice it these could be simplified but generating default from a single text-string and then allowing individual actions to override them if necessary.

[xendk]

Trying to avoid having stiff generic messages is much the culpit here.

There is some room for improvement though.