fix(gui): Disable throttling timers when in background
fix(gui): Disable throttling timers when in background

This disables Electron throttling timers when not in the foreground.

Change-Type: patch

resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/etcher,resin-io/herostratus,resin-io/herostratus,resin-io/etcher,resin-io/resin-etcher,resin-io/resin-etcher