Turning a pref switch to on that invokes the restart alert bar should close the alert bar when switched back to off.

[bradleyrichter]

STR:

1. open prefs
2. change DNT setting to on
3. see Restart alert bar appear.
4. turn DNT switch off

result:
Alert bar remains open

expected:
Alert bar auto-closes

cc @diracdeltas

[diracdeltas]

cc @darkdh

[willy-b]

@darkdh, I happened to have just been looking at this code, so a potentially useful reference of where you might be making changes:

js/about/preferences.js:657:

  onChangeSetting (key, value) {
    this.setState({
      settings: this.state.settings.set(key, value)
    })
    aboutActions.changeSetting(key, value)
    if (key === settings.DO_NOT_TRACK || key === settings.HARDWARE_ACCELERATION_ENABLED ||
      key === settings.PDFJS_ENABLED || key === settings.SMOOTH_SCROLL_ENABLED) {
      ipc.send(messages.PREFS_RESTART)
    }
  }

app/index.js:397:

    ipcMain.on(messages.PREFS_RESTART, () => {
      var message = locale.translation('prefsRestart')

      appActions.showMessageBox({
        buttons: [locale.translation('yes'), locale.translation('no')],
        options: {
          persist: false
        },
        message
      })
      prefsRestartCallbacks[message] = (buttonIndex, persist) => {
        delete prefsRestartCallbacks[message]
        if (buttonIndex === 0) {
          app.relaunch({args: process.argv.slice(1) + ['--relaunch']})
          app.quit()
        } else {
          appActions.hideMessageBox(message)
        }
      }
    })

[bbondy]

This was reverted here:
c84e656

...because of an issue with clicking yes to restart not having any effect.
It's not critical for 0.11.4 though anyway so please just do a new commit for this when fixed.