Fix: tabs move animation for duplicated tabs (#5426)

* fix: check endValue for running animations only

* exit early when move is not needed

* ref: remove useless `positionChangedAnimationRunning_`

* check for parent notebook visibility instead

* ref: rename `pos` param to `targetPos`

src/widgets/helper/NotebookTab.hpp

@@ -65,7 +65,7 @@ public:
     void setHighlightsEnabled(const bool &newVal);
     bool hasHighlightsEnabled() const;
 
-    void moveAnimated(QPoint pos, bool animated = true);
+    void moveAnimated(QPoint targetPos, bool animated = true);
 
     QRect getDesiredRect() const;
     void hideTabXChanged();
@@ -108,7 +108,6 @@ private:
     int normalTabWidthForHeight(int height) const;
 
     QPropertyAnimation positionChangedAnimation_;
-    bool positionChangedAnimationRunning_ = false;
     QPoint positionAnimationDesiredPoint_;
 
     Notebook *notebook_;