[backport#14375] qt: Correct misleading "overridden options" label

Summary:
75143612546450c064ccd8dcf1f7f6e79f397802 Correct misleading "overridden options" label (Hennadii Stepanov)

Pull request description:

Refs: #3867, #8165.

Backport of Core PR14375

Test Plan:

ninja

Reviewers: #bitcoin_abc, PiRK

Reviewed By: PiRK

Differential Revision: https://reviews.bitcoinabc.org/D8135