FS-8205 [verto_communicator] Add splash screen feature

html5/verto/verto_communicator/src/partials/splash_screen.html

@@ -0,0 +1,21 @@
+<div class="centered-block-frame" id="splash_screen"> 
+  <div class="col-md-6 centered-block">
+    <div class="card">
+      <div class="card-body text-center">
+	<h2>Loading</h2>
+	<div class="progress progress-striped active">
+	  <div class="progress-bar" ng-class="{'progress-bar-danger': interrupt_next}" style="width: {{ progress_percentage }}%"></div>
+	</div>
+	<div ng-bind="message"></div>
+	
+	<div class="splash-errors" ng-if="errors.length">
+	  <h4>Errors</h4>
+	  <ul ng-repeat="error in errors">
+	    <li>{{ ::error }}</li>
+	  </ul>
+	</div>
+      </div>
+    </div>
+  </div>
+</div>
+