Delete CR comment

As a Code Reviewer I'd like to be able to remove my comments if I think that I wrote bullshit

• Given User has permission DELETE_OWN_POSTS, he/she can see Delete button (like a cross, Х with a tooltip "delete" for all languages) and be able to delete previously left comment.
• If User is not given DELETE_OWN_POSTS permission, he/she can't see Delete button.
• Given User is restricted from DELETE_OWN_POSTS, she can't see Delete button even if she is in another group which's allowed.
• Given User pressed the Delete button, he/she sees the confirmation dialog.
• The Confirmation dialog should contain Yes and No buttons.
• Given User deletes comment by pressing Yes in confirmation dialog and comment mustn't be visible to all user of forum.

As a Moderator I'd like to be able to remove CR comments if inappropriate content appears
Given User is given DELETE_OTHERS_POSTS, she can delete comments left by other users. Even if she doesn't have DELETE_OWN_POSTS.