do not change side view frame, background and selection if sideViewDrawFrame is set to true

set autoFillBackground to false on viewports on top of changing the background role

kstyle/breezestyle.cpp

@@ -301,7 +301,9 @@ namespace Breeze
             addEventFilter( widget );
 
             // force KPageListView flat
-            if( widget->inherits( "KDEPrivate::KPageListView" ) || widget->property( PropertyNames::sidePanelView ).toBool() )
+            if(
+                !StyleConfigData::sidePanelDrawFrame() &&
+                ( widget->inherits( "KDEPrivate::KPageListView" ) || widget->property( PropertyNames::sidePanelView ).toBool() ) )
             {
                 scrollArea->setFrameStyle( QFrame::NoFrame );
                 scrollArea->setBackgroundRole( QPalette::Window );
@@ -313,6 +315,7 @@ namespace Breeze
                 {
                     viewport->setBackgroundRole( QPalette::Window );
                     viewport->setForegroundRole( QPalette::WindowText );
+                    viewport->setAutoFillBackground( false );
                     viewport->setPalette( _helper->sideViewPalette( viewport->palette() ) );
                 }
 
@@ -3170,6 +3173,7 @@ namespace Breeze
         const bool hasCustomBackground = viewItemOption->backgroundBrush.style() != Qt::NoBrush && !( state & State_Selected );
         const bool hasSolidBackground = !hasCustomBackground || viewItemOption->backgroundBrush.style() == Qt::SolidPattern;
         const bool hasAlternateBackground( viewItemOption->features & QStyleOptionViewItemV2::Alternate );
+        const bool isSidePanel( !StyleConfigData::sidePanelDrawFrame() && widget && widget->property( PropertyNames::sidePanelView ).toBool() );
 
         // do nothing if no background is to be rendered
         if( !( mouseOver || selected || hasCustomBackground || hasAlternateBackground ) )
@@ -3177,7 +3181,7 @@ namespace Breeze
 
         // define color group
         QPalette::ColorGroup colorGroup;
-        if( enabled ) colorGroup = active ? QPalette::Active : QPalette::Inactive;
+        if( enabled ) colorGroup = ( active || isSidePanel ) ? QPalette::Active : QPalette::Inactive;
         else colorGroup = QPalette::Disabled;
 
         // render alternate background
@@ -3241,7 +3245,7 @@ namespace Breeze
 
         }
 
-        const bool isSidePanel( widget && widget->property( PropertyNames::sidePanelView ).toBool() );
+        // adjust rect
         if( isSidePanel )
         {
             rect.setWidth( Metrics::SidePanel_ItemMarginWidth );