Test case:
nmcli> goto ipv4.addresses
nmcli ipv4.addresses> set 1.1.1.1
Do you also want to set 'ipv4.method' to 'manual'? [yes]: no
nmcli ipv4.addresses> set 3.3.3.3/99
Error: failed to set 'addresses' property: invalid prefix '99'; <1-32> allowed
Do you also want to set 'ipv4.method' to 'manual'? [yes]:
The second question (after failed 'set') should not be asked.
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