Polish "Enable caching of static resources"

Closes gh-332

src/main/resources/application.properties

@@ -21,5 +21,5 @@ logging.level.org.springframework=INFO
 # logging.level.org.springframework.web=DEBUG
 # logging.level.org.springframework.context.annotation=TRACE
 
-# Maximum time the static resources (css, js, fonts and images) should be cached
+# Maximum time static resources should be cached
 spring.resources.cache.cachecontrol.max-age=12h