Merge pull request #802 from mattermost/plt-291

PLT-291 Fixing 404 page props

api/templates/error.html

@@ -23,7 +23,7 @@
 		<div class="error__container">
 			<div class="error__icon"><i class="fa fa-exclamation-triangle"></i></div>
 			<h2>{{ .ClientProps.SiteName }} needs your help:</h2>
-			<p>{{.Message}}</p>
+			<p>{{ .Props.Message }}</p>
 			<a href="{{.Props.SiteURL}}">Go back to team site</a>
 		</div>
 	</div>