information buttons

## Trac Ticket #9
**component:** website
**owner:** somebody
**reporter:** dagmar
**created:** 2016-06-30 23:08:37
**milestone:** 
**type:** task
**version:** 
**keywords:** 

can we have little information buttons behind the rankers weights that explain the indexes in one sentence? 

preferably, using the same buttons we use for most.  