Port away from KStatefulBrush::brush(const QWidget*)

Soon to be deprecated, use the QPalette overload instead.

kmail/grammarplugins/grammarcommon/grammarresulttextedit.cpp

@@ -60,7 +60,7 @@ void GrammarResultTextEdit::generalPaletteChanged()
     color.setAlpha(128);
     mTextColor = color;
     const KStatefulBrush bgBrush = KStatefulBrush(KColorScheme::View, KColorScheme::NegativeText);
-    mNegativeTextColor = bgBrush.brush(this).color();
+    mNegativeTextColor = bgBrush.brush(palette).color();
 }
 
 void GrammarResultTextEdit::applyGrammarResult(const QVector<GrammarError> &infos)

sieveeditor/emaillineedit/emaillineedit.cpp

@@ -135,7 +135,7 @@ void EmailLineEdit::verifyAddress()
     mEmailIsValid = lineEditText.contains(QLatin1Char('@'));
     if (mNegativeBackground.isEmpty()) {
         KStatefulBrush bgBrush = KStatefulBrush(KColorScheme::View, KColorScheme::NegativeText);
-        mNegativeBackground = QStringLiteral("QLineEdit{ background-color:%1 }").arg(bgBrush.brush(this).color().name());
+        mNegativeBackground = QStringLiteral("QLineEdit{ background-color:%1 }").arg(bgBrush.brush(palette()).color().name());
     }
     if (!mEmailIsValid) {
         styleSheet = mNegativeBackground;