Request

I think the current case sensitivity toggle has two issues:

• By default, it's not obvious that it's a button that can be clicked since it has no outline. I know other software uses this kind of border-less theming, but I don't think it works well for new users.
• I can't tell whether it's on or off since the only difference is that it has an outline when it's one on of the states.

Possible implementation

• Give the button an outline at all times.
• Use colour to indicate whether it's turned on or off.