Calendar popup on account's page operation search is not working properly.

Trying to type date time manually, searching for account's operations by time range causes the whole calendar to stop working (user is not allowed to click any date or field, neither select the time). This happens when date time selected by default is being removed. When not removing the date time selected by default and trying to type any other time, the time is acting like just being draw.

Reproduction steps:

1. Visit any account's page
2. Select time range in operation search section
3. Open calendar by clicking from/to date
4. Select Hours/Minutes/Seconds field and:

• remove the value
• type another value without removing the previous one