Backport PR
#8271: Allow to set same mode as existing if load fails....
Backport PR
#8271: Allow to set same mode as existing if load fails.
Setting the mode many times in a row, would fail to actually set the
mode if it was failing to load the mode the first time.
The prevent the above behavior by falling back **explicitly** to 'null'
if mode does not exist yet, or can't be loaded.
...
