Method refresh

src/helpViewer/panel.ts:67–72

()

    }

    public async refresh(): Promise<void> {
        for (const he of [...this.history, ...this.forwardHistory]) {
            he.isStale = true;
        }
        await this.refreshCurrentEntry();
    }
    
    public async refreshPreview(packageDir: string): Promise<void> {
        if(this.currentEntry?.helpFile.packageDir === packageDir){