[bug] 3 hours are selected when clicking in the center of 9 hours

[anton-nikiforenko]

Browser: Chrome 80.0.3987.163

Steps to reproduce:

1. Open timepicker modal https://agranom.github.io/ngx-material-timepicker/
2. Via dev tools, add css to see the centers of clockface hours digits:

.clock-face__number span:after {
    content: ' ';
    position: absolute;
    left: 15px;
    top: 15px;
    border: 1px solid red;
}

3. Click in exact center of span containing "9" digit

[anton-nikiforenko]

The same thing occures when clicking on 21 hours (will select 15 hours), 45 minutes (will select 15 minutes).

[anton-nikiforenko]

Here is example reproducing.
http://www.mediafire.com/file/znqen0w5vg4f03y/screen-capture.webm/file