[PUI] User settings panel updates (#7944)

* Simplify user theme settings

* Cleanup

* Fix permission on user list endpoint

* Update AccountDetailPanel to use modal form

* Update components

* UI updates

* Implement default colors

* Display more user details (read only)

* Add specific "MeUserSerializer"

- Prevent certain attributes from being adjusted

* Add <YesNoUndefinedButton>

* Allow role checks to be bypassed for a given view

- Override the 'get_permission_model' attribute with None

* Enable 'GET' metadata

- Required for extracting field information even if we only have 'read' permissions
- e.g. getting table columns for users without write perms
- use 'GET' action when reading table cols

* Add info on new user account

* Fix boolean expression wrapper

* Ruff fixes

* Adjust icon

* Update unit test

* Bummp API version

* Table layout fix

docs/docs/demo.md

@@ -16,6 +16,7 @@ The demo instance has a number of user accounts which you can use to explore the
 
 | Username | Password | Staff Access | Enabled | Description |
 | -------- | -------- | ------------ | ------- | ----------- |
+| noaccess | youshallnotpass | No | Yes | Can login, but has no permissions |
 | allaccess | nolimits | No | Yes | View / create / edit all pages and items |
 | reader | readonly | No | Yes | Can view all pages but cannot create, edit or delete database records |
 | engineer | partsonly | No | Yes | Can manage parts, view stock, but no access to purchase orders or sales orders |