Bug with value list on add user to group

[dynstatic]

java.lang.IndexOutOfBoundsException: Index 50 out of bounds for length 50

In the AddUserToGroupDialog, the username ComboBox data provider uses query.getOffset() directly as the page number for PageRequest.of(), but getOffset() returns the absolute row offset (e.g., 50), not the page index (e.g., 1). Same issue exists for groupName. This causes the ndexOutOfBoundsException when the combo box tries to load its second page.
The fix is in UserToGroupView.java — divide query.getOffset() by query.getLimit() to get the correct page number:
File: src/main/java/software/netcore/radman/ui/view/UserToGroupView.java
Change both CallbackDataProvider lambdas inside AddUserToGroupDialog:

username.setDataProvider(new CallbackDataProvider<>(query ->
        userService.pageRadiusUsers(new RadiusUserFilter(query.getFilter().orElse(null),
                true, false), PageRequest.of(query.getOffset(),
                query.getLimit(), new Sort(Sort.Direction.ASC, "id")))
                .stream(),
        query -> (int) userService.countRadiusUsers(new RadiusUserFilter(query.getFilter()
                .orElse(null), true, false))));

// AFTER (fixed):
username.setDataProvider(new CallbackDataProvider<>(query ->
        userService.pageRadiusUsers(new RadiusUserFilter(query.getFilter().orElse(null),
                true, false), PageRequest.of(query.getOffset() / query.getLimit(),
                query.getLimit(), new Sort(Sort.Direction.ASC, "id")))
                .stream(),
        query -> (int) userService.countRadiusUsers(new RadiusUserFilter(query.getFilter()
                .orElse(null), true, false))));```

```// BEFORE (broken) - groupName ComboBox:
groupName.setDataProvider(new CallbackDataProvider<>(query ->
        userService.pageRadiusUsersGroup(new RadiusGroupFilter(query.getFilter().orElse(null),
                true, false), PageRequest.of(query.getOffset(),
                query.getLimit(), new Sort(Sort.Direction.ASC, "id")))
                .stream(),
        query -> (int) userService.countRadiusUsersGroup(new RadiusGroupFilter(query.getFilter()
                .orElse(null), true, false))));

// AFTER (fixed):
groupName.setDataProvider(new CallbackDataProvider<>(query ->
        userService.pageRadiusUsersGroup(new RadiusGroupFilter(query.getFilter().orElse(null),
                true, false), PageRequest.of(query.getOffset() / query.getLimit(),
                query.getLimit(), new Sort(Sort.Direction.ASC, "id")))
                .stream(),
        query -> (int) userService.countRadiusUsersGroup(new RadiusGroupFilter(query.getFilter()
                .orElse(null), true, false))));

[dynstatic]

This bug happens when you have more than 50 users in the system and you try and add a user to a group. The pop up list of users loads the first 50, if you scroll the list down, it bombs out with the error.