Wallpaper: shaders improvements with more parameters and new Stripes shader

Commons/Settings.qml

@@ -170,6 +170,7 @@ Singleton {
         property int randomIntervalSec: 300 // 5 min
         property int transitionDuration: 1500 // 1500 ms
         property string transitionType: "random"
+        property real transitionEdgeSmoothness: 0.05
         property list<var> monitors: []
       }