disable okay button by default

set button to be disabled untill an entry is added

src/ui/dialogs/medienadder.py

@@ -15,13 +15,20 @@ class MedienAdder(QtWidgets.QDialog, Ui_Dialog):
         self.lineEdit.returnPressed.connect(self.add_signature)
         self.btn_cancel.clicked.connect(self.close)
         self.btn_save.clicked.connect(self.send_data)
-
+        #disable button box button okay
+        self.btn_save.setEnabled(False)
+        
+    def enable_button(self):
+        if self.listWidget.count() > 0:
+            self.btn_save.setEnabled(True)
+        else:
+            self.btn_save.setEnabled(False)
     def add_signature(self):
         signature = self.lineEdit.text()
         self.listWidget.addItem(signature.strip())
         self.lineEdit.clear()
         self.list_amount.setText(str(self.listWidget.count()))
-
+        self.enable_button()
     def get_list_data(self) -> list:
         signatures = self.listWidget.findItems("*", QtCore.Qt.MatchFlag.MatchWildcard)
         return [signature.text() for signature in signatures]