I have a multi-root workspace with the vscode-sources and an extension (called 'virtual'). Both folders have vscode.d.ts and while I surely have opened both files at least once, I have opened vscode.d.ts from the vscode-sources at least 1000-times more often (and more recent). Still, the file picker presents the vscode.d.ts from the extension on top, always. It seems like I once made a mistake to open the wrong vscode.d.ts-file and I am still being punished for that.