run the snippet using the atlantic theme:
hover the column separators used to resize the columns.
The mouse cursor doesn't indicate resizability for column 1 and 3
Only column 2 switches to a resizing mouse cursor style 'e-resize'
Always display the resizing mouse cursor.
(preferably: ew-resize as used in other themes)
the .z-column-sort .z-column-content styles have a higher specificity
add a custom style