The working time unit can either be hours or days. In case of days, should
replace the references to hours in the view to days. In case of days, use float
field instead of float_time.
Using the string 'Hours' as a way to determine the unit is too weak as:
1. it does not work in other language than english
2. if the unit is renamed (*cough* 1626eca *cough*), it will fail as well
Using the object with context to compare strings in the user language.
lp:1080191, opw 595397
1219b56bcc