fix(bec_connector): dedicated remove signal added for listeners

bec_widgets/utils/bec_connector.py

@@ -77,6 +77,7 @@ class BECConnector:
 
     USER_ACCESS = ["_config_dict", "_get_all_rpc", "_rpc_id"]
     EXIT_HANDLERS = {}
+    remove_signal = Signal()
 
     def __init__(
         self,
@@ -450,6 +451,7 @@ class BECConnector:
         # i.e. Curve Item from Waveform
         else:
             self.rpc_register.remove_rpc(self)
+        self.remove_signal.emit()  # Emit the remove signal to notify listeners (eg docks in QtADS)
 
     def get_config(self, dict_output: bool = True) -> dict | BaseModel:
         """