Add hints for Sensor.Community setup (#448)

* Add placeholder for sensor.community setup

* Add translation keys

Author: mpfeil

app/views/account.box.register.html

@@ -972,9 +972,16 @@ <h4>CO<sub>2</sub></h4>
                 </div>
                 <div uib-accordion-group class="panel-default" is-open="register.open.luftdaten">
                   <uib-accordion-heading>
-                    luftdaten.info <i class="pull-right glyphicon"
+                    Sensor.Community (luftdaten.info) <i class="pull-right glyphicon"
                       ng-class="{'glyphicon-chevron-down': register.open.collapse2, 'glyphicon-chevron-right': !register.open.collapse2}"></i>
                   </uib-accordion-heading>
+
+                  <!-- Hint for non predefined devices -->
+                  <div class="alert alert-info" role="alert">
+                    <span class="glyphicon glyphicon-info-sign" aria-hidden="true"></span>
+                    {{'LD_INFO_PREDEF_DEVICES' | translate}}
+                  </div>
+
                   <div class="radio radio-success">
                     <input type="radio" name="model" id="luftdaten-sds011" value="luftdaten_sds011"
                       ng-model="register.modelSelected.id" required>
@@ -1097,6 +1104,7 @@ <h4>CO<sub>2</sub></h4>
                   <br>
                   <div uib-alert class="alert-info" ng-bind-html="'CUSTOMBOX'|translate">
                   </div>
+                  <div class="alert alert-info" ng-bind-html="'CUSTOMBOX_LD_DEVICE_INFO'|translate"></div>
                   <br>
                   <table class="table table-striped table-bordered">
                     <thead>