Fix Edit Description button is wildly out of place.

Thanks to C0rn3j and xet7 !

Fixes #5413

client/components/cards/cardDetails.jade

@@ -525,8 +525,8 @@ template(name="cardDetails")
                 a.fa.fa-times-thin.js-close-inlined-form
             else
               if currentBoard.allowsDescriptionText
-                a.js-open-inlined-form.right(title="{{_ 'edit'}}" value=title)
-                  i.fa.fa-pencil-square-o
+                a.js-open-inlined-form(title="{{_ 'edit'}}" value=title)
+                  i.fa.fa-plus
                 if getDescription
                   +viewer
                     = getDescription