let sobreWindow = null;
ipcMain.on('abrir-janela-sobre', () => {
console.log(sobreWindow);
if(sobreWindow == null){
let sobreWindow = new BrowserWindow({
width: 300,
height:200
});
sobreWindow.on('closed', () => {
sobreWindow = null;
});
}
sobreWindow.loadURL('file://'+__dirname+'/app/sobre.html');
});
