Revert r42514 for now "(bug 16073) * Use onclick handler for expand/collapse in enhan...

Revert r42514 for now "(bug 16073) * Use onclick handler for expand/collapse in enhanced recentchanges."

A few issues I noted:
* The expand/contract icons no longer have regular link behavior (eg no hand icon, can't be reached by keyboard tabbing)
* It looks like the stuff-to-be-hidden doesn't get hidden until after the </body>, which feels a little sketchy to me. On long lists and slow connections you may see odd behavior with the items being shown expanded, then suddenly hiding when things reach the end. Adding the style immediately in the JS instead of waiting for the body load completion should avoid that
* mw-rc-jshidden class seems to be applied to things that shouldn't have it sincec they are explicitly given display:none?
* Instead of style='display:none' etc, consider using clear classes for expanded and hidden modes, then switch the classes instead of the styles in the JS