Issues fixed after a period of internal usage

We are using Cuckoo at Kauplus and have done the following improvements/fixes:
- fixed #1 (Time entry form doesn't indicate which fields are invalid);
- fixed #2 (Calendar widget is partly covered by time entry timer);
- fixed #3 (Order users, tasks and projects by name rather than id);
- fixed #4 (Can't insert line breaks in time entry description);
- fixed #5 (Time information is always shown in UTC, regardless of application settings);
- changed the design of time entries in the timesheet page;
- the users page now shows who are admins.