Integration tests: Collapsible: Make "Expand/Collapse" test reusable and apply it to pre-rendered collapsible.
Integration tests: Collapsible: Make "Expand/Collapse" test reusable and apply it to pre-rendered collapsible.

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