Invalid time input from keyboard to form with timepicker causes an error 'Cannot read property 'replace' of null' #349
Description
I have a form with added ngx-material-timepicker.
Also have a method in .component.ts, that parses invalid time input from keyboard. For example '12' will be edited to legal '12:00'.
It worked until version 5.3.0 inclusive. But in later versions the wrong keyboard time entry causes an error 'Cannot read property 'replace' of null'.
