open Histogram chart on click on header historgram

When user clicks on histogram in column header SOCRAT needs to open Charts -> Histogram and select the clicked variable

[ ] needs to be implemented via messaging system
[ ] will require expending Charts messaging API to enable to select type of chart and variable(s)
[ ] will require getting Charts routing URL and redirecting there
[ ] test with failing Charts module, has to output message that Charts are not available

SOCR / SOCRAT-issues