Number of cards per list and sum of custom number field in list head.

Thanks to xet7 !

Fixes #3796

client/components/boards/boardArchive.jade

@@ -1,6 +1,6 @@
 template(name="archivedBoards")
   h2
-    i.fa.fa-archive
+    span(title="{{_ 'archived-boards'}}") 📦
     | {{_ 'archived-boards'}}
 
   ul.archived-lists
@@ -8,10 +8,10 @@ template(name="archivedBoards")
       li.archived-lists-item
         div.board-header-btns
           button.board-header-btn.js-delete-board
-            i.fa.fa-trash-o
+            | 🗑️
             | {{_ 'delete-board'}}
           button.board-header-btn.js-restore-board
-            i.fa.fa-undo
+            | ↩️
             | {{_ 'restore-board'}}
           = title
         span {{ moment archivedAt 'LLL' }}

client/components/boards/miniboard.jade

@@ -3,6 +3,6 @@ template(name="miniboard")
     class="minicard-{{colorClass}}")
     .minicard-title
       .handle
-        .fa.fa-arrows
+        span.drag-handle(title="{{_ 'dragBoard'}}") ↕️
       +viewer
         = title