[ui] Edge: Added child mouseArea to handle clicks

Handling mouseClickEvent on QQuickItem was sometimes crashing when querying QMouseEvent::button(), adding a child mouse area to check if the pressed point exists on the edge to accept or reject an event seems like a better workaround and is stable

meshroom/ui/qml/GraphEditor/Edge.qml

@@ -151,5 +151,28 @@ Item {
              * account. */
             curveScale = Qt.binding(() => cubic.ctrlPtDist / root.width)  // Normalize by width
         }
+
+        MouseArea {
+            anchors.fill: parent
+            acceptedButtons: Qt.LeftButton | Qt.RightButton
+
+            onPressed: function(mouse) {
+                if (edgeArea.containsPoint(Qt.point(mouse.x, mouse.y))) {
+                    root.pressed(mouse);
+                }
+                else {
+                    mouse.accepted = false;
+                }
+            }
+
+            onReleased: function(mouse) {
+                if (edgeArea.containsPoint(Qt.point(mouse.x, mouse.y))) {
+                    root.released(mouse);
+                }
+                else {
+                    mouse.accepted = false;
+                }
+            }
+        }
     }
 }