Details: add clickListener to Summary field

[Herm71]

After adding the details block, the initial click into the field opens/closes the block prior to being able to edit the field. The edit.js file currently employs a "listener" on the space bar. I believe we need one for Click, too.

Current listener as example:

const keyUpListener = ( e ) => { if ( e.keyCode === SPACE ) { e.preventDefault(); } };

[Herm71]

Re-opening issue. "Fix" didn't work.