Do not auto-reload app when system comes back from sleep.
Do not auto-reload app when system comes back from sleep.

Improves #412, #312.

zulip/zulip-electron,zulip/zulip-desktop,zulip/zulip-electron,zulip/zulip-electron,zulip/zulip-desktop,zulip/zulip-desktop,zulip/zulip-desktop