Update grid test format.
Check extension capabilities of silent classes.
Reformat controls for the widths module. Fully support silent classes.
Turn off html classes by default.
Rework the controls for this utility. Support silent classes, with the exception of tables and table-elements.
Remove padding subtraction when there is only one grid-item. It lives in the widths module.
Add connecting classes to test silent classes.
Adjust settings for testing.