input field update.

Author: Cheikh Seck

web/settings.html

@@ -131,7 +131,7 @@
                 <input type="text" placeholder="+00000" ng-model="mega.SMS.From" class="form-control">
                 <br>
                 <label>Country prefix to prepend to each contact's phone number.</label>
-                <input type="text" placeholder="..." ng-model="mega.SMS.CountryCode" class="form-control">
+                <input type="text" placeholder="+000" ng-model="mega.SMS.CountryCode" class="form-control">
                 <br>
                 <button ng-click="updateTw()" ng-disabled="loading" class="mdc-button mdc-button--raised">Save</button>
             </div>