Cannot 'mount' remote folder with `SSF FS` VSCode extension

Bug Description:

extension: https://marketplace.visualstudio.com/items?itemName=Kelvin.vscode-sshfs description: I could add configuration to sshfs extension, and open a remote SSH terminal with it. But I can't mount the remote folder as a workspace folder. Actually, after I click the 'Connect as Workspace folder' button, theia does show an empty folder in the workspace list, but, no contents are listed below that.

Steps to Reproduce:

1. install Kelvin.vscode-sshfs extension;
2. follow tutorial on https://marketplace.visualstudio.com/items?itemName=Kelvin.vscode-sshfs;

Additional Information

• Operating System: Linux
• Theia Version: 896948679a2a2fbb4928