Improve antialiasing, fix a config UI issue

kwin/src/kcm/breezydesktopeffectkcm.cpp

@@ -45,8 +45,6 @@ BreezyDesktopEffectConfig::BreezyDesktopEffectConfig(QObject *parent, const KPlu
 
 BreezyDesktopEffectConfig::~BreezyDesktopEffectConfig()
 {
-    // If save() is called, undo() has no effect.
-    ui.shortcutsEditor->undo();
 }
 
 void BreezyDesktopEffectConfig::load()

kwin/src/qml/main.qml

@@ -54,7 +54,8 @@ Item {
         View3D {
             anchors.fill: parent
             environment: SceneEnvironment {
-                antialiasingMode: SceneEnvironment.MSAA
+                antialiasingMode: SceneEnvironment.SSAA
+                antialiasingQuality: SceneEnvironment.VeryHigh
             }
             
             PerspectiveCamera {