Add date and time settings

Adds ablity to change date and time manually, or
configure using NTP servers.

- If NTP is selected, user is required to enter at least one
  NTP address
- Date and time are ISO formatted

Signed-off-by: Dixsie Wolmers <dixsie@ibm.com>
Change-Id: I0d67c80487fdd815eacc3539ccd702b23618260e
diff --git a/src/components/AppNavigation/AppNavigation.vue b/src/components/AppNavigation/AppNavigation.vue
index 1dfba11..175b0aa 100644
--- a/src/components/AppNavigation/AppNavigation.vue
+++ b/src/components/AppNavigation/AppNavigation.vue
@@ -59,6 +59,9 @@
               <icon-expand class="icon-expand" />
             </b-button>
             <b-collapse id="configuration-menu" tag="ul" class="nav-item__nav">
+              <b-nav-item to="/configuration/date-time-settings">
+                {{ $t('appNavigation.dateTimeSettings') }}
+              </b-nav-item>
               <b-nav-item href="javascript:void(0)">
                 {{ $t('appNavigation.firmware') }}
               </b-nav-item>