fix one pixel glitch for parabolic effect

--finally after two years I found why there was a glitch
when the parabolic effect was hovering from Task into
an applet and vice versa. Tasks were rounding their
size before exposing it to container. Now this is fixed.
--Drag a task animation is now improved to be a little
more responsive and to inform also its mask requirements
to animations

plasmoid/package/contents/ui/main.qml

@@ -211,8 +211,11 @@ Item {
         }
     }
 
-    property int tasksHeight: mouseHandler.height
-    property int tasksWidth: mouseHandler.width
+    //! Real properties are need in order for parabolic effect to be 1px precise perfect.
+    //! This way moving from Tasks to Applets and vice versa is pretty stable when hovering with parabolic effect.
+    property real tasksHeight:  mouseHandler.height
+    property real tasksWidth: mouseHandler.width
+
     //updated from Binding
     property int alignment
 
@@ -1132,7 +1135,7 @@ Item {
 
             visible: root.dragAreaEnabled
 
-            property int maxSize: ((parabolic.local.lastIndex>=0 || windowPreviewIsShown || animations.hasThicknessAnimation) && !root.dragSource) ?
+            property int maxSize: (parabolic.local.lastIndex>=0 || windowPreviewIsShown || animations.hasThicknessAnimation) ?
                                       (parabolic.factor.maxZoom * metrics.totals.thickness) + metrics.margin.screenEdge :
                                       metrics.totals.thickness + metrics.margin.screenEdge
 

plasmoid/package/contents/ui/task/IconItem.qml

@@ -657,6 +657,8 @@ Item{
 
     //////////// Transitions //////////////
 
+    readonly property string draggingNeedThicknessEvent: taskIcon + "_dragging"
+
     transitions: [
         Transition{
             id: isDraggedTransition
@@ -666,8 +668,8 @@ Item{
             SequentialAnimation{
                 ScriptAction{
                     script: {
+                        taskItem.animations.needThickness.addEvent(draggingNeedThicknessEvent);
                         taskItem.inBlockingAnimation = true;
-                        taskItem.parabolic.startRestoreZoomTimer();
                         taskItem.parabolic.setDirectRenderingEnabled(false);
                     }
                 }
@@ -675,8 +677,8 @@ Item{
                 PropertyAnimation {
                     target: wrapper
                     property: "mScale"
-                    to: 1 + ((taskItem.parabolic.factor.zoom - 1) / 3)
-                    duration: isDraggedTransition.speed / 2
+                    to: 1
+                    duration: taskItem.parabolic.factor.zoom === 1 ? 0 : (isDraggedTransition.speed*1.2)
                     easing.type: Easing.OutQuad
                 }
 
@@ -705,11 +707,19 @@ Item{
                         easing.type: Easing.OutQuad
                     }
                 }
+
+                ScriptAction{
+                    script: {
+                        taskItem.animations.needThickness.removeEvent(draggingNeedThicknessEvent);
+                    }
+                }
             }
 
             onRunningChanged: {
                 if(running){
                     taskItem.animationStarted();
+                } else {
+                    taskItem.animations.needThickness.removeEvent(draggingNeedThicknessEvent);
                 }
             }
         },