Fix Qt 0.14.2->0.15.0 segfault if "total at least" is selected
Fix Qt 0.14.2->0.15.0 segfault if "total at least" is selected

A button was removed, so now button(1) is nullptr

Github-Pull: #11332
Rebased-From: cdaf3a1f9e93be273ebf3e470dc709828c55476c
Tree-SHA512: 0a49bf4e9ab08e5869170c8a212da60c9a6b90c36427d788de384aa4be6d87bb5e00a21edf78eed34f81bbc554b6f15565bb9b493dafcbfe9d6f4664d7424d9d

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