Add $config->versionUrls() method for versioned file URLs and update the admin themes to use it

wire/core/FilenameArray.php

@@ -10,7 +10,7 @@
  *
  */
 
-class FilenameArray implements \IteratorAggregate, \Countable {
+class FilenameArray extends Wire implements \IteratorAggregate, \Countable {
 
 	/**
 	 * Array of filenames indexed by MD5 hash of filename
@@ -87,6 +87,23 @@ class FilenameArray implements \IteratorAggregate, \Countable {
 		return new \ArrayObject($this->data); 
 	}
 
+	/**
+	 * Get cache-busting URLs for this FilenameArray
+	 * 
+	 * This is the same as iterating this FilenameArray except that it appends cache-busting
+	 * query strings to the URLs that resolve to physical files. 
+	 * 
+	 * @param bool|null|string $useVersion See Config::versionUrls() for arument details
+	 * @return array
+	 * @throws WireException
+	 * @see Config::versionUrls()
+	 * @since 3.0.227
+	 * 
+	 */
+	public function urls($useVersion = null) {
+		return $this->wire()->config->versionUrls($this, $useVersion);
+	}
+
 	/**
 	 * Make FilenameArray unique (deprecated)
 	 *