[UX] Disabling an exchange in the settings pane would disconnect any pairs

[adeacetis]

Is your feature request related to a problem? Please describe.**

As a user, when I disable an exchange globally from the settings pane, it's unclear if the connected pairs are still part of the aggregated output or not.

Describe the solution you'd like

I expect connections to be closed when an exchange is globally disabled. To avoid closing connections by mistake, a confirmation dialog with a warning message and the pairs that will be disconnected if I go through with my action.

Describe alternatives you've considered

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Additional notes

1. The explanation message on the left of the section heading is misleading me into thinking I could click on it to disable all exchanges at once. Maybe could we add disconnect all exchange buttons here at once so the user would have to confirm once and then reactivate whatever exchange he needs?
   

2. If an exchange is disabled but still has pairs alive active then it will remain green. I understand the logic behind but it is confusing to me at first. When I disable something globally, I expect the color to change and to disable any active elements it's linked to.