In igxHierarchicalGrid it is not possible to navigate through the parent summaries by using "Tab", if the last child grid is expanded #4416
When the last child grid has been expanded, trying to use "Tab" key to go through the parent summaries does not work.
Steps to reproduce
Pressing Tab 3 times selects the last cell of the row, but pressing it 4th time does not navigate through the parent grid summaries. Tab key goes through the summaries only if the last row of the parent grid is not currently expanded.
"Tab" key should navigate through the parent summaries irrespective of the expand/collapse state of the last row.