By default the table has its data merged from left to right columns.
Jira Issue
Use Case 1:
Given the user can move a column to the first position in the table with a simple drag/drop When the values of the first column are identical
Use Case 1: Given the user can move the position of a columns in the table with a simple drag/drop When the attribute in the privous column Then the experiment cells with the same value should be merged