change tooltip/popover insert strategy

remove modal-open class
hopefully resolve z-index headaches

docs/assets/js/bootstrap-modal.js

@@ -49,8 +49,6 @@
 
         if (this.isShown || e.isDefaultPrevented()) return
 
-        $('body').addClass('modal-open')
-
         this.isShown = true
 
         this.escape()
@@ -96,8 +94,6 @@
 
         this.isShown = false
 
-        $('body').removeClass('modal-open')
-
         this.escape()
 
         $(document).off('focusin.modal')