Collapsible: Don't unset the border of nested collapsibles in a set of individual collapsibles. Fixes #6188.
Collapsible: Don't unset the border of nested collapsibles in a set of individual collapsibles. Fixes #6188.

arschmitz/uglymongrel-jquery-mobile,hinaloe/jqm-demo-ja,hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,hinaloe/jqm-demo-ja,arschmitz/jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/uglymongrel-jquery-mobile,arschmitz/jquery-mobile