Two fields number_of_days_display and number_of_hours_display are used to set
a number_of_days field that stores the allocation day count of the allocation.
Those two fields are interface fields. One or another is used depending on the
leave type, depending on how the allocation is done: by hours or by days.
This commit fixes a wrong computation of number of days by correctly setting
a readonly attribute on unused fields as well as removing the inverse on the
interface fields. Using onchange ensure the backend field is correctly
computed. Moreover we could have two times the same tracking message as the
inverse triggers another write and cache could consider the tracking two
times.
Thibault Delavallée
c59d6d2329