Merge JS for files_versions

Shaves off 3 requests.

Signed-off-by: Lukas Reschke <lukas@statuscode.ch>

apps/files_versions/js/merged.json

+[
+  "versionmodel.js",
+  "versioncollection.js",
+  "versionstabview.js",
+  "filesplugin.js"
+]

apps/files_versions/lib/Hooks.php

@@ -163,9 +163,6 @@ class Hooks {
 	 * Load additional scripts when the files app is visible
 	 */
 	public static function onLoadFilesAppScripts() {
-		\OCP\Util::addScript('files_versions', 'versionmodel');
-		\OCP\Util::addScript('files_versions', 'versioncollection');
-		\OCP\Util::addScript('files_versions', 'versionstabview');
-		\OCP\Util::addScript('files_versions', 'filesplugin');
+		\OCP\Util::addScript('files_versions', 'merged');
 	}
 }