fix custom_link to use custom_link.full_icon

Author: manuel-rubio

lib/kaffy_web/templates/layout/app.html.eex

@@ -65,7 +65,7 @@
               <li class="nav-item">
                 <%= link to: custom_link.url, method: custom_link.method, class: "nav-link", target: custom_link.target do %>
                   <span class="menu-title"><%= custom_link.name %></span>
-                  <i class="<%= if custom_link.full_icon do %><%= custom_link[:full_icon] %><% else %>fas fa-<%= custom_link.icon %><% end %> menu-icon"></i>
+                  <i class="<%= if custom_link.full_icon do %><%= custom_link.full_icon %><% else %>fas fa-<%= custom_link.icon %><% end %> menu-icon"></i>
                 <% end %>
               </li>
             <% end %>