jquery.makeCollapsible: add a few explicit options to the jQuery plugin

Add a few options to the jQuery plugin to allow for explicit passing
of various options in addition to the conventions used now (via data-
attributes or magic id/class combinations).

Change-Id: Ic498e7a3b2d2e964bda8d31a70f71cda08560cec
Merge "jquery.makeCollapsible: add a few explicit options to the jQuery plugin"