FIREFLY-137: add additional information into the row highlight action

[loitly]

https://jira.ipac.caltech.edu/browse/FIREFLY-137
From ticket:

• one or more columns' values or the entire row
• the "absolute row index" of the row in the table (i.e., an index that refers to the same row no matter how the filter or sort state of the table may have changed)
• the relative index of the row in the currently displayed content of the table
• the checkbox state of the row

Also:

• added test case to demonstrate how to listen to table events
• add feature copy source to clipboard to integrated test framework

Best to see this in action. Test case #4
https://irsawebdev9.ipac.caltech.edu/FIREFLY-137_table_highlight_info/firefly/test/tests-table.html#4

[ejoliet]

Checked that the row index is added.
Nice 'copy' feature on the tests pages.
Thanks!