Removed type conversions where no longer needed

PHP 8.1 PDO SQLite now returns native data types

public/js/extensions.js

@@ -11,11 +11,6 @@ String.prototype.contains = function(search)
 	return this.toLowerCase().indexOf(search.toLowerCase()) !== -1;
 };
 
-String.prototype.isEmpty = function()
-{
-	return (this.length === 0 || !this.trim());
-};
-
 String.prototype.replaceAll = function(search, replacement)
 {
 	return this.replace(new RegExp(search, "g"), replacement);