Add a way to hide specific disks and temperature sensors from being displayed

[ClementTsang]

Describe the feature request

Why should we consider this feature request? Describe why, and/or how you think this feature will solve the issue, or overall improve the application:

We should have a way to hide specific disk entries and temperature sensors. From #158

The reason I group these together is that the implementation of one basically solves the other. Main things to consider (for both):

• How are we designing an interface to show/hide?
• How to make this hiding persistent via config file (Add in-app way to change a config file #159)? Shouldn't be hard, but this means that this feature is gated behind finishing that feature first.