Allow HTML in success messages

HTML-formatted text in the success message displayed when creating a
new service user was not rendered.

Change-Id: I3f5d33d2f42f32d92aa4c0b32d82c96b8d2a91f8
diff --git a/src/main/resources/static/gr-serviceuser-create.html b/src/main/resources/static/gr-serviceuser-create.html
index 9034ada..763c47d 100644
--- a/src/main/resources/static/gr-serviceuser-create.html
+++ b/src/main/resources/static/gr-serviceuser-create.html
@@ -78,11 +78,10 @@
                    cancel-label=""
                    on-confirm="_forwardToDetails"
                    confirm-on-enter>
-          <div class="header" slot="header">
+          <div slot="header">
             Success
           </div>
-          <div class="main" slot="main">
-            [[_successMessage]]
+          <div id="successMessage" slot="main">
           </div>
         </gr-dialog>
       </gr-overlay>
diff --git a/src/main/resources/static/gr-serviceuser-create.js b/src/main/resources/static/gr-serviceuser-create.js
index 84fc808..df5d9a6 100644
--- a/src/main/resources/static/gr-serviceuser-create.js
+++ b/src/main/resources/static/gr-serviceuser-create.js
@@ -82,6 +82,7 @@
             if (config.on_success && config.on_success != '') {
               this._successMessageEnabled = true;
               this._successMessage = config.on_success;
+              this.$.successMessage.innerHTML = this._successMessage;
             }
 
             this._emailEnabled = config.allow_email;