Click does not select the hour or minute part correctly if the input's width is longer than its content

[loebi-ch]

If I make the input field longer than its content, the selection of the hour or minute part does not really work correctly by clicking with the mouse or touching with the finger.

In the current version (2.1.5) I calculate the middle of the input (subtracting its left and right padding). There must be a better way to detect which part to select.