Fix board archive instructions

Fixes #277.

client/components/boards/boardHeader.jade

@@ -124,4 +124,4 @@ template(name="boardChangeTitlePopup")
 
 template(name="archiveBoardPopup")
   p {{_ 'close-board-pop'}}
-  button.js-confirm.negate.full(type="submit") {{_ 'close'}}
+  button.js-confirm.negate.full(type="submit") {{_ 'archive'}}

i18n/en.i18n.json

@@ -37,7 +37,7 @@
     "archive-card": "Archive Card",
     "archive-list": "Archive this list",
     "archive-selection": "Archive selection",
-    "archiveBoardPopup-title": "Close Board?",
+    "archiveBoardPopup-title": "Archive Board?",
     "archived-items": "Archived Items",
     "archives": "Archives",
     "assign-member": "Assign member",
@@ -91,7 +91,7 @@
     "clipboard" : "Clipboard or drag & drop",
     "close": "Close",
     "close-board": "Close Board",
-    "close-board-pop": "You can re-open the board by clicking the “Boards” menu from the header, selecting “View Closed Boards”, finding the board and clicking “Re-open”.",
+    "close-board-pop": "You will be able to restore the board by clicking the “Archives” button from the home header.",
     "color-green": "green",
     "color-yellow": "yellow",
     "color-orange": "orange",