I think there are the following issues with rB5fa6cdb77a98: Add unit for time stored in seconds:

• it does not take preferred unit settings into account
• if we introduce a PROP_UNIT_TIME_ABSOLUTE unit, shouldnt it be visible

to RNA as well?

• seems like a double entry sneaked into that commit?

This is in preparation to use this for render time limit in cycles-x (if
a user decides to input this as minutes [or even hours]).

ref. T90701