fix issue with grid.addRowHeader function
Revert "Revert "Merge pull request #1528 from PaulL1/header_and_column_menus""

This reverts commit 6f6de098e2c200da961abb7a2adcc04b6db8ee88.
fix test for the fixing of rowHeader
Merge branch 'master' into 3.0-custom-filter-function

Conflicts:
	src/js/core/directives/ui-grid-header-cell.js