FIX: Edit / Settings / General / DefaultTimeStep works.

Go to first/last time step works. For 'Leave current time unchanged, if
possible' I do nothing.

Change-Id: I4e3efbb50f6eac8c24f1b02bc5a309a9f01d3146
Fix warning.

Change-Id: Ie659ea483f2a2e7202550706216648d6da54a56d
Merge topic 'settings-15161'

cbca6e4c Fix warning.
c3bab35c FIX: Edit / Settings / General / DefaultTimeStep works.