fix(pyqt): webengine must be imported before qcoreapplication

bec_widgets/utils/__init__.py

@@ -1,3 +1,5 @@
+from qtpy.QtWebEngineWidgets import QWebEngineView
+
 from .bec_connector import BECConnector, ConnectionConfig
 from .bec_dispatcher import BECDispatcher
 from .bec_table import BECTable