Various changes

mobile-friendly ui updates
admin user-edit bugfix
file cleanup
added searchFields
add blog search
remove unused code
add maintenance mode config

app/models/log.php

@@ -46,6 +46,9 @@ class Log extends DatabaseModel {
         [ 'source', 'varchar', '64' ],
         [ 'action', 'text', '' ],
     ];
+    public $searchFields = [
+        'source',
+    ];
 
     /**
      * The model constructor.