You could do it this way:

Add a enumeration with two values: true and false. Assign a checked and unchecked image to the enumeration values. Create a microflow which changes the enumeration value from false to true and true to false. Set this button as default button and voila. When you double click, the value will be changed.

This way you don't need to use the nasty inline editing feature and you can achieve what you really want: quickly changing a boolean.

No.

(Apparently the answer 'no' is too short, so this extra line is to circumvent that restriction.)

Hmm, not in a datagrid no.

Edit: In my defense, I only misread 4 letters ;)