Use shorter date display, and add icon.
Display icons on the left of counters.
More compact task board.

- Move category indication to top-right corner.
- Rounded corners.
- Slightly increase icons size.
- Slightly reduce font size.
- Reduce title margin.
Add option to disable SSL certificate verification for LDAP.
Show task count in each column even if no limit is set.

In this case, the count is displayed in a lighter shade. Display of task
limit is not affected.