Bugfix
If the GUI inspector is applied to the cells of a fixed column, the wrong column is calculated.
For example, if the GUI inspector in "Tables > Grid" is applied to a cell in the "Name" column, the dialog defaults to "long" as the column label.
Test
Navigate to the view Tables > Grid and use the GUI inspector to examine a cell of a fixed column (e.g. the column Name) and a non-fixed column (e.g. the column structure). In the dialog that opens when you click the GUI inspector, you should see the correct column label.