config_service: make validation errors more distinguishable

appengine/config_service/ui/src/config-ui/config-set.html

Index: appengine/config_service/ui/src/config-ui/config-set.html
diff --git a/appengine/config_service/ui/src/config-ui/config-set.html b/appengine/config_service/ui/src/config-ui/config-set.html
index 2d846f634f8378ece184465c18b2df070ea208cb..e56cbb1a9f5f1a6860fdd28a406b931a2585f8fe 100644
--- a/appengine/config_service/ui/src/config-ui/config-set.html
+++ b/appengine/config_service/ui/src/config-ui/config-set.html
@@ -113,7 +113,7 @@
         </template>
         <template is="dom-if" if="[[auth_headers]]">
           <iron-icon id="force-refresh"
-                     icon="icons:refresh"
+                     icon="icons:file-download"
                      on-tap="_forceRefresh">
           </iron-icon>
           <paper-tooltip for="force-refresh" offset="0">
@@ -126,7 +126,9 @@
         <template is="dom-if" if="[[_not(isLoading)]]">
           <template is="dom-if" if="[[lastImportAttempt]]">
             <template is="dom-if" if="[[_not(lastImportAttempt.success)]]">
-              Last import attempt failed: [[lastImportAttempt.message]]
+              <div class="paper-red">
+                Last import attempt failed: [[lastImportAttempt.message]]
+              </div>
             </template>
             <template is="dom-if" if="[[lastImportAttempt.success]]">
               Last import succeeded.