Add ui-inset class for listview and accordion

[jaspermdegroot]

Add ui-inset class for listview and collapsible instead of using ui-listview and ui-listview-inset to separate style from structure.

[gabrielschulhof]

Also make sure to announce that the value of true of the collapsible inset option is deprecated in favour of false, which will be the new default as of 1.6.0.

[arschmitz]

Collapsible no longer part of this may want to look at for accordion though re #7798