Version ITFlow's scripts and stylesheets so browsers fetch the new copies after an update instead of needing a cache clear: add staticFileUrl() in functions/app.php, which adds ?v= and the file's modification time to the address, and send every script and stylesheet tag through it, libs included, with page-relative addresses changed to start from the site root; add js/tinymce_defaults.js to set TinyMCE's cache_suffix so the plugins, theme and skins it loads itself are versioned too; load ticket collision detection only when a ticket is shown, so a ticket that isn't found no longer throws a script error; add changelog entries and a CONTRIBUTING rule that new tags must use staticFileUrl()

admin/managed_instance.php

@@ -400,7 +400,7 @@ $size = function ($mb) {
 </div>
 
 <?php if ($waiting && !$removed) { ?>
-    <script src="../js/auto_reload.js"></script>
+    <script src="<?= staticFileUrl('/js/auto_reload.js') ?>"></script>
 <?php } ?>
 
 <?php