some very small fix for image alternative text and browse files manager

app/assets/javascripts/admin/filemanager.js

@@ -49,7 +49,7 @@ $(document).ready(function(){
 	})
 	insertBtn.bind(clickEvent,function(){
 		var alt_text = $("#"+language+"_desc_"+$("input[type=checkbox]:checked").val()).val();
-		alt_text = (alt_text ? alt_text : "This is alt text");
+		alt_text = (alt_text ? alt_text : "This is an image");
 		if(url){
 			window.opener.CKEDITOR.tools.callFunction( funcNum, url, function() {
 			    var element,