Add a toggle switch for muting diagnostics

[rak-phillip]

This adds a toggle switch for toggling the display of muted diagnostics.

Examples

closes #2656

[ericpromislow]

I should just mention that later on, when we have something similar to settings.json toggling the muted state on a diagnostic will need to be pushed to ipcMain to store that muted state with every reported diagnostic. When a diagnostic is no longer failing, it should be removed from that settings file.

[rak-phillip]

Presumably actually persisting the muted state will be in a future PR.

This is correct, we don't really have a mechanism on the backend for storing results at the moment, everything is in a static yaml file.

It would be good if the column width for Category is fixed; currently, if you mute the Networking diagnostic (leaving the Utilities ones), then hiding diagnostics causes the whole table to shift. But that's a paper cut.

This is a great call out! I added widths to the Documentation, Category, and Mute columns to reduce the amount of jitter when transitioning between states.