"Edit comment" and "Delete comment" URLs have a bad "xredirect" parameter

Steps to reproduce:

1. go to Main.WebHome
2. add a comment
3. right click on the edit button of the new comment, select "open on a new tab"
4. look at the URL:
   http://localhost:8080/xwiki/bin/view/Main/?viewer=comments&number=0&xredirect=/xwiki/bin/view/Main/?xpage=xpart&vm=commentsinline.vm

The xredirect section is bad.

1. Save your comment
2. You are redirected to /xwiki/bin/view/Main/?xpage=xpart&vm=commentsinline.vm...

Why?

Because the xredirect parameter is computed in commentsinline.vm which is loaded by an AJAX request.

#set($xredirect = $!escapetool.xml($request.get("xredirect")))
#if("$!xredirect" == '')
  #set($xredirect = "$doc.getURL('view')?$request.getQueryString()")
#end

$request.getQueryString() returns the current ajax query string...

It is a minor problem because usually people edit their comment inline with JavaScript.