D14444: Use nullptr/override

[Vlad Zagorodniy]

zzag added inline comments.

INLINE COMMENTS

> ListViewSettings.cpp:47
>    delete m_settingsWidget;
> +  m_settingsWidget = nullptr;
>  }

This class is about to go away so this assignment is redundant.

REPOSITORY
  R106 KSysguard

REVISION DETAIL
  https://phabricator.kde.org/D14444

To: al1xz
Cc: zzag, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart
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