[zh_CN] Time truncation in Advanced tab of Tasks - New Task dialog.

Description of problem:
[zh_CN] Time truncation in Advanced tab of Tasks - New Task dialog.

Version-Release number of selected component (if applicable):
6.4.0.GA ER3

How reproducible:
100%

Steps to Reproduce:
1. Click Tasks -> New Task.
2. Click on Advanced tab.

Actual results:
[zh_CN] Time truncation in Advanced tab of Tasks - New Task dialog.

Expected results:
No truncation

Additional info:
Please see the attached screen-shot.