debug: close whole vscode 'browser' when ending sessions
debug: close whole vscode 'browser' when ending sessions

Fixes https://github.com/microsoft/vscode-js-debug/issues/554

eamodio/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,hoovercj/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,hoovercj/vscode,microsoft/vscode,microsoft/vscode,hoovercj/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,hoovercj/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,microsoft/vscode,hoovercj/vscode,eamodio/vscode,hoovercj/vscode,hoovercj/vscode,hoovercj/vscode,Microsoft/vscode,eamodio/vscode,hoovercj/vscode,Microsoft/vscode,eamodio/vscode,hoovercj/vscode,Microsoft/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,hoovercj/vscode,hoovercj/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,Krzysztof-Cieslak/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,hoovercj/vscode,hoovercj/vscode,Krzysztof-Cieslak/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode