Media browser: recursive scan entire content/ tree, /-media/ URL prefix, editor change detection fix

- handleMediaList() now scans content/ recursively for all media files
- URLs use /-media/ prefix mapping directly to content/ (no special cases)
- index.php: added /-media/ route, kept /-assets/ for backward compat
- editor-toolbar.js: fixed editor.on('change') placement (was inside switchMode)
- content-edit.php and content-new.php: back-btn unsaved-changes detection
- Removed unused __editorCleanup global

plugins/MQTTTracker/config.json

@@ -1,7 +1,8 @@
 {
     "enabled": true,
-    "broker_host": "mqtt.prive.noorlander.info",
-    "broker_port": 1883,
+    "viewable": false,
+    "broker_host": "mqtt.lan.noorlander.info",
+    "broker_port": "1883",
     "client_id": "codepress_cms",
     "username": "",
     "password": "",
@@ -10,6 +11,6 @@
     "track_pages": true,
     "track_performance": true,
     "track_user_flows": true,
-    "session_timeout": 1800,
-    "geoip_database_path": "/plugins/MQTTTracker/GeoLite2-Country.mmdb"
-}
+    "session_timeout": "1800",
+    "geoip_database_path": "\/plugins\/MQTTTracker\/GeoLite2-Country.mmdb"
+}