Sticky headers (#9022)

* Add user setting

* Use value of user setting

* Fix user for global

* Stickiness

* Updated docs

src/backend/InvenTree/common/setting/user.py

@@ -185,6 +185,12 @@ USER_SETTINGS: dict[str, InvenTreeSettingsKeyType] = {
         'default': False,
         'validator': bool,
     },
+    'STICKY_TABLE_HEADER': {
+        'name': _('Fixed Table Headers'),
+        'description': _('Table headers are fixed to the top of the table'),
+        'default': False,
+        'validator': bool,
+    },
     'ICONS_IN_NAVBAR': {
         'name': _('Navigation Icons'),
         'description': _('Display icons in the navigation bar'),