Form_Field: cleanup
Form_Field: cleanup

1) Form_Field_Text setFieldHint same as Form_Field
2) Removed obsolete methods setFieldTitle, clearFieldValue, setDefault, getDefault. These are obsolete since 4.1 and needs to be removed at some point. Also I checked that ATK4, atk4-addons and ambient-addons don't use these.
3) $mandatory_template variable fix
4) some comments fixed
atk4/atk4,atk4/atk4,svisystem/atk4,svisystem/atk4,atk4/atk4,atk4/atk4,samratcis/atk4,samratcis/atk4,xepan/atk4,xepan/atk4,samratcis/atk4,svisystem/atk4,xepan/atk4