Fix TypeError: Cannot read property 'isVisible' of undefined
Fix TypeError: Cannot read property 'isVisible' of undefined

Between v1.32.1 and v1.32.2, createMainWindow() was made an
async function, so createTrayIcon() and setupMenu() were called too early.

await createMainWindow() before adding the tray icon and menu.

Co-authored-by: Matthias Andree <130179e29d1ad0f75488e3d67b8fee29a1d2e593@gmx.de>
nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop,nrizzio/Signal-Desktop