src/vs/workbench/services/dialogs/browser/simpleFileDialog.ts/SimpleFileDialog/constructFullUserPath
class SimpleFileDialog:	private constructFullUserPath(): string {
		const currentFolderPath = this.pathFromUri(this.currentFolder);
		if (equalsIgnoreCase(this.filePickBox.value.substr(0, this.userEnteredPathSegment.length), this.userEnteredPathSegment)) {
			if (equalsIgnoreCase(this.filePickBox.value.substr(0, currentFolderPath.length), currentFolderPath)) {
				return currentFolderPath;
			} else {
				return this.userEnteredPathSegment;
			}
		} else {
			return this.pathAppend(this.currentFolder, this.userEnteredPathSegment);
		}
	}