- Replace .form-group Boostrap helper class with .mb-3. The .form-group class was only
adding margin bottom styles, so it is an straightforward change.
- Replace .form-group references in SCSS files with .fitem now .form-group has been removed.
- There were some other .form-group occurrences in the code that were using it not for styling
but incorrectly for managing some logic. These have been also replaced with .fitem or removed.