04b7b683ed
Adds close() no-op method to QEQRScanner to prevent type errors like this: ``` 01-02 17:28:09.645 10543 10565 I python : 162.27 | W | gui.qml.qeapp | file:///data/data/org.electrum.electrum/files/app/electrum/gui/qml/components/SweepDialog.qml:123: TypeError: Property 'close' of object QEQRScanner(0xdd32f66fb600) is not a function ```