Fixes from tests of the Electron app on Windows and Linux, and from reviews:
- Device rows: the buttons stay under the pointer, the right-click menu opens, and the spinner keeps turning in Electron.
- Login: a login on a profile with no ~/.expo/orbit is saved, a login that stayed open on macOS no longer blocks a new one, and a login or log out in one Electron window reaches the other windows.
- Tray menu on Linux, with an Open Orbit item.
- Android: the stop of an emulator waits until adb no longer lists it and reports a stop that fails, and adb output is split on both line endings.
- Remote sessions: separate messages for a session that failed and one that was stopped, an icon for an ended session, and the popover stays closed after Start session when the session opens in the browser.