chore: add leave event

libs/pyTermTk/TermTk/TTkWidgets/TTkModelView/treewidget.py

@@ -708,7 +708,7 @@ class TTkTreeWidget(TTkAbstractScrollView):
             return True
         return False
 
-    def mouseMoveEvent(self, evt) -> None:
+    def mouseMoveEvent(self, evt) -> bool:
         y = evt.y
         _, oy = self.getViewOffsets()
         # Handle Header Events
@@ -723,6 +723,11 @@ class TTkTreeWidget(TTkAbstractScrollView):
             return True
         return True
 
+    def leaveEvent(self) -> None:
+        if self._hoverItem is not None:
+            self._hoverItem = None
+            self.update()
+
     @pyTTkSlot()
     def _alignWidgets(self) -> None:
         self.layout().clear()