Add the ability to disable features (RSS/notes)

[PhilC813]

Is your feature request related to a problem? Please describe.
Some users may prefer to use their purpose-specific app of choice instead of the features, or simply have no intention to use them.

Describe the solution you'd like
Add a setting that allows you to turn off built-in features/pages. The most coherent implementation would be to organize the settings page with each feature having its own section (i.e., simply add a horizontal line or else to separate them), and with the first option being an on/off switch; the other options for each feature could only appear conditionally based on if the feature is on or off, optimizing use of space.

Describe alternatives you've considered
N/A

Additional context
N/A

[PhilC813]

Could be relevant to be worked on along issue #8, which requests the ability to customize the ways of accessing the different pages.