some control-sidebar fixes

- removed setMargin in js
- fixed control-sidebar slide animate step
- added zindex-contro-sidebar
- added control-sidebar-push class
- updated zindex's

docs/components/control-sidebar.md

@@ -7,6 +7,10 @@ Control sidebar is the right sidebar. It can be used for many purposes and is ex
 
 The following code should be placed within the `.wrapper` div. I prefer to place it right after the footer.
 
+##### Control Sidebar Push
+{: .text-bold .text-dark}
+By adding the `.control-sidebar-push` to `body`, the sidebar pushes the content away instead of overlaying the content.
+
 ##### Dark Sidebar Markup
 {: .text-bold .text-dark}
 ```html