GrupoCorpodatRecords Code

@ AddComercialDialog:
- Delegation pre-selected automatically.
- Just own delegation (and subdelegations) added to comboBox.
@ ClientsPanel:
- Fixed comment update (no repetitions now).
- Fixed payment save (wasn't saving it).
- Fixed payment loading (was always loading bank account).
@ CoursesPanel:
- Fixed students update (was no updating data and deleting student sometimes).

@ CommentJpaController:
- Some exceptions chatched when looking up for a comment (NonUniqueResult, NoResult).
@ Client:
- CommentId field init changed to -1.

Added button for ClientListingPanel @ CoursesPanel.
Disabled delete buttons @ ClientsPanel, CoursesPanel.

Some changes/fixes:
- Delegation is now pre-selected and un-changeable @ AddCommercialDialog
- Payment way is now selectable (only bank account mode has input data)
- Focos Traversal Cycle has been changed @ ClientsPanel
- CreationDate un-editable but shown @ ClientsPanel

Added field PaymentMode @ Client's entity class.
Added getters & setters.
Added -1 as initial value.

Implemented custom focus subsystem on ClientsPanel.

Replaced "joker" character for * (just replacing '*' by '%' on ClientListingDialog.filterClients).

Enabled click on "Password" label for showing password on plain text.

Fixed findPerson on PersonJpaController.

Fixed setBankAccount on ClientsPanel.