The icon that is displayed in the employee kanban view is determined by the
field hr_icon_display, computed in the method _compute_hr_icon_display. This
method is overridden in multiple modules such as hr_holidays, hr_attendance
and hr_homeworking.
Currently this field has a state to show no icon (presence_undetermined). In
this change this state is extracted into the a separate field
show_hr_icon_display with the default state of hr_icon_display being
presence_to_define. In this way a module such as hr_attendance, which only
overrides _compute_hr_icon_display to show the default icon for everyone as a
default, now only needs to change this separate field and does not need any
knowledge of what other states exist. This reduces coupling between modules.
Rob Coekaerts
351bcdbb41