Fixed images used fadein even if loaded from cache

TODO

@@ -16,7 +16,6 @@ first major release.
   http://svn.apache.org/repos/asf/httpd/httpd/trunk/README
 - misc: add spinner to forms such as registration, login, settings...
 - misc: improve throbber appearance
-- misc: try not to fade in images that are already in browser cache
 
 - post notes
     - "add note" in sidebar creates new note in the middle of image

public_html/js/Util.js

@@ -25,10 +25,12 @@ App.Util = function(_, jQuery, marked, promise) {
 	}
 
 	function loadImagesNicely($img) {
-		$img.css('opacity', '0');
-		$img.bind('load', function() {
-			$img.animate({opacity: 1}, 'fast');
-		});
+		if (!$img.get(0).complete) {
+			$img.css('opacity', '0');
+			$img.bind('load', function() {
+				$img.animate({opacity: 1}, 'fast');
+			});
+		}
 	}
 
 	function promiseTemplate(templateName) {