On Linux and Windows, both files and folders cannot be opened at the same time in electron.
OPEN_FILE and OPEN_FOLDER must be available only on Linux and Windows in electron.
OPEN must not be available on Windows and Linux in electron.
VS Code does the same. See: https://github.com/eclipse-theia/theia/pull/3202#issuecomment-430585357
On Linux and Windows, both files and folders cannot be opened at the same time in electron.
OPEN_FILEandOPEN_FOLDERmust be available only on Linux and Windows in electron.OPENmust not be available on Windows and Linux in electron. VS Code does the same. See: https://github.com/eclipse-theia/theia/pull/3202#issuecomment-430585357