Replace favicon in public folder and fix what's new title [SCI-5319] (#4224)

* Fix what's new tab name [SCI-5319]

* Change favicons in public folder [SCI-5319]

app/views/shared/_navigation.html.erb

@@ -34,14 +34,14 @@
              aria-expanded="false"
              data-href="<%= system_notifications_url(format: :json) %>">
             <i class="fas fa-gift"></i>
-            <span class="visible-xs-inline visible-sm-inline"><%= t("system_notifications.index.whats_new") %></span>
+            <span class="visible-xs-inline visible-sm-inline"><%= t("system_notifications.index.whats_new_html") %></span>
             <span id="count-system-notifications"
                   data-href="<%= unseen_counter_system_notifications_url %>">
             </span>
           </a>
           <ul class="dropdown-menu dropdown-system-notifications">
             <li class="system-notifications-dropdown-header">
-              <span class="pull-left"><%= t("system_notifications.index.whats_new") %></span>
+              <span class="pull-left"><%= t("system_notifications.index.whats_new_html") %></span>
               <span class="show-all">
                 <%= link_to t('system_notifications.index.see_all'), system_notifications_path %>
               </span>

app/views/system_notifications/index.html.erb

@@ -1,8 +1,8 @@
-<% provide(:head_title, t("system_notifications.index.whats_new")) %>
+<% provide(:head_title, t("system_notifications.index.whats_new_html")) %>
 
 <div class="content-pane" id="system-notifications-index">
   <h3 class="title-container">
-    <strong><%= t("system_notifications.index.whats_new") %></strong>
+    <strong><%= t("system_notifications.index.whats_new_html") %></strong>
     <%= link_to t("system_notifications.index.settings"), preferences_path %>
   </h3>
   <%= form_tag system_notifications_path, method: :get, id: "search-bar-notifications", class: "navbar-form navbar-left", role: "search" do %>