Use non-deprecated QPalette roles

kdecoration/breezebutton.cpp

@@ -135,7 +135,7 @@ namespace Breeze
             if (auto deco =  qobject_cast<Decoration*>(decoration())) {
                 const QPalette activePalette = KIconLoader::global()->customPalette();
                 QPalette palette = c->palette();
-                palette.setColor(QPalette::Foreground, deco->fontColor());
+                palette.setColor(QPalette::WindowText, deco->fontColor());
                 KIconLoader::global()->setCustomPalette(palette);
                 c->icon().paint(painter, iconRect.toRect());
                 if (activePalette == QPalette()) {

kstyle/breezehelper.cpp

@@ -332,7 +332,7 @@ namespace Breeze
 
         QPalette copy( source );
 
-        const QList<QPalette::ColorRole> roles = { QPalette::Background, QPalette::Highlight, QPalette::WindowText, QPalette::ButtonText, QPalette::Text, QPalette::Button };
+        const QList<QPalette::ColorRole> roles = { QPalette::Window, QPalette::Highlight, QPalette::WindowText, QPalette::ButtonText, QPalette::Text, QPalette::Button };
         foreach( const QPalette::ColorRole& role, roles )
         { copy.setColor( role, KColorUtils::mix( source.color( QPalette::Active, role ), source.color( QPalette::Disabled, role ), 1.0-ratio ) ); }