Feature: Copy Card Details code block to clipboard.

Thanks to C0rn3j and xet7 !

Fixes #5149

client/components/cards/cardDetails.css

@@ -196,6 +196,9 @@
   margin-right: 10px;
   padding: 10px;
 }
+.card-details .card-description i.fa.fa-pencil-square-o {
+  float: right;
+}
 .card-details .card-description textarea {
   min-height: 100px;
 }

client/components/cards/cardDetails.jade

@@ -524,12 +524,13 @@ template(name="cardDetails")
                 a.fa.fa-times-thin.js-close-inlined-form
             else
               if currentBoard.allowsDescriptionText
-                a.js-open-inlined-form
-                  if getDescription
-                    +viewer
-                      = getDescription
-                  else
-                    | {{_ 'edit'}}
+                a.js-open-inlined-form.right(title="{{_ 'edit'}}" value=title)
+                  i.fa.fa-pencil-square-o
+                if getDescription
+                  +viewer
+                    = getDescription
+                else
+                  | {{_ 'edit'}}
                 if (hasUnsavedValue 'cardDescription' _id)
                   p.quiet
                     | {{_ 'unsaved-description'}}