add mouse selection in kpz geometry window

src/View/Geometry/Window.py

@@ -382,7 +382,8 @@ class GeometryWindow(PamhyrWindow):
             study=self._study,
             data=self._reach,
             trad=self._trad,
-            toolbar=self._toolbar_kpc
+            toolbar=self._toolbar_kpc,
+            parent=self
         )
         self._plot_kpc.draw()