Mark a few more props as readonly
Mark a few more props as readonly

microsoft/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,Microsoft/vscode,microsoft/vscode,microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,Microsoft/vscode,microsoft/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,Microsoft/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,eamodio/vscode,microsoft/vscode,Microsoft/vscode,eamodio/vscode,eamodio/vscode