Actions on EGI totals

[oleh-maikovych]

Description

EGI is the most powerfull and configurable component in TG platform. It allows to specify columns that shouldn't be scrolled. It provides a way to edit entities right in the grid, it allows user to chage column width etc. Also it provides a way to specify action for specfic column that can be triggerd by clicking on cell in this column. EGI also allow developer to specify multilevel totals for specific column. But there are no API to specify action for total cell in the specific column.

Please provide API to specify custom action for total cell.

Expected outcome

Totals in EGI should becomee actionable.