Revert "Part 3. Hide and disable Keyboard Shortcuts, because they make using Ctrl-C to copy etc impossible."

This reverts commit 8b73c702c39a1fd546e591a096d703a53577ffec.

client/components/sidebar/sidebar.jade

@@ -6,8 +6,8 @@ template(name="sidebar")
     //  i.fa.fa-navicon
     .sidebar-actions
       .sidebar-shortcuts
-        |  
-        |  
+         
+         
         //a.board-header-btn.js-shortcuts(title="{{_ 'keyboard-shortcuts' }}")
         //  i.fa.fa-keyboard-o
         //  span {{_ 'keyboard-shortcuts' }}