App stops updating on resume after suspend mode

Description

<!-- Issuehunt Badges --> [<img alt="Issuehunt badges" src="https://img.shields.io/badge/IssueHunt-%24100%20Funded-%2300A156.svg" />](https://oss.issuehunt.io/r/sindresorhus/caprine/issues/103) <!-- /Issuehunt Badges --> Pretty rare case, not sure yet about 1.4 (just updated), but for 1.3 reproduces. When close MBP, go to another network and open it there some time later (few hours or so) - in some cases app stops getting updates. And can't send messages in this state as well, errors returned. When app relaunched, messages was trying to send aren't there, but works finely, with fresh history. I understand it may be not related to the app, as a Facebook's Messenger front-end bug. But maybe it's reasonable to use the [power-monitor](https://github.com/electron/electron/blob/master/docs/api/power-monitor.md) as workaround to reload the web view on `resume`? <!-- Issuehunt content --> --- <details> <summary> <b>IssueHunt Summary</b> </summary> ### Backers (Total: $100.00) - [<img src='https://avatars3.githubusercontent.com/u/44827199?v=4' alt='issuehunt' width=24 height=24> issuehunt](https://oss.issuehunt.io/u/issuehunt) ($100.00) ### Submitted pull Requests - [#1 Reload Messenger after system resume](https://oss.issuehunt.io/r/OMGletmein/caprine/pull/1) --- #### [Become a backer now!](https://oss.issuehunt.io/r/sindresorhus/caprine/issues/103) #### [Or submit a pull request to get the deposits!](https://oss.issuehunt.io/r/sindresorhus/caprine/issues/103) ### Tips - Checkout the [Issuehunt explorer](https://oss.issuehunt.io/r/sindresorhus/caprine/) to discover more funded issues. - Need some help from other developers? [Add your repositories](https://oss.issuehunt.io/r/new) on IssueHunt to raise funds. </details> <!-- /Issuehunt content-->