Improve notification settings

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

js/src/components/NavBar.vue

@@ -222,6 +222,7 @@ nav {
   .navbar-item {
     a.button.is-success {
       background: #1e7d97;
+      font-weight: bold;
     }
 
     svg {

js/src/components/Settings/NotificationsOnboarding.vue

@@ -6,14 +6,12 @@
       </div>
       <div class="field">
         <strong>{{
-          $t("We'll always send you emails to notify about important event updates")
+          $t(
+            "Mobilizon will send you an email when the events you are attending have important changes: date and time, address, confirmation or cancellation, etc."
+          )
         }}</strong>
         <p>
-          {{
-            $t(
-              "Like title or physical address update, start or end date change or event being confirmed or cancelled."
-            )
-          }}
+          {{ $t("Other notification options:") }}
         </p>
       </div>
       <div class="field">