Experiment new ergonomics to interact with card details

The idea is that by displaying card details in a sidebar stuck on the
right of the screen, the mouse had to travel too much before
interacting with it. I also don’t want to use the Trello solution
(modal) on big screens, because I like the ability to interact with
the selected card and with the board at the same time (like in a
e-mail client).

The solution introduced in this commit consist of opening the card
detail in a column next to the minicard list.

This commit also fix right sidebar members and labels drag and drop.

client/components/boards/body.jade

@@ -1,6 +1,7 @@
 //-
   XXX This template can't be transformed into a component because it is
   included by iron-router. That's a bug.
+  See https://github.com/peerlibrary/meteor-blaze-components/issues/44
 template(name="board")
   +boardComponent
 
@@ -11,11 +12,11 @@ template(name="boardComponent")
         .lists.js-lists
           each lists
             +list(this)
+            if currentCardIsInThisList
+              +cardDetails(currentCard)
           if currentUser.isBoardMember
             +addListForm
       +boardSidebar
-    if currentCard
-      +cardSidebar(currentCard)
   else
     +message(label="board-no-found")