Better configuration for exposed sensors

[drylemon]

Is your feature request related to a problem? Please describe.
As a user I would like to have an easy way to manage exposed sensors so that I can see, add, delete exposed sensors, and assign/reorder channel numbers.

Describe the solution you'd like
I would like to have a list that displays the exposed sensors together with their channel number. There should also be an option to add new sensors at the bottom of the list.
When opening an exposed sensor from the list I would love to have the option to remove it from the list or assign a channel number.
If the channel number is already taken I would love to get asked if both entries should be swaped or added in between.
If it should be removed then I would love to get asked if the channel number should stay empty or if the gap should be closed (i.e. renumbering all following sensors).

Describe alternatives you've considered
Drag and drop would also be great for easy rearrangement or the ability to just swap two adjacent sensors.

Additional context
Add any other context or screenshots about the feature request here.