Multiple select lists with radio buttons inside
Please check source code for details
Tree structure for this control:
main_select_container
|
+-tree_nav_container
|
+-category_container
|
+-category 1
| |
| +-group 1
| |
| +-item 1
| |
| +-item 2
| |
| +-item n
|
+-category 2
|
+-group 2
|
+-item 1
|
+-item 2
|
+-item n