change tooltip/popover insert strategy

remove modal-open class
hopefully resolve z-index headaches

js/bootstrap-tooltip.js

@@ -121,7 +121,7 @@
         $tip
           .remove()
           .css({ top: 0, left: 0, display: 'block' })
-          .appendTo(inside ? this.$element : document.body)
+          .insertAfter(this.$element)
 
         pos = this.getPosition(inside)
 
@@ -144,7 +144,7 @@
         }
 
         $tip
-          .css(tp)
+          .offset(tp)
           .addClass(placement)
           .addClass('in')
       }
@@ -272,4 +272,4 @@
   , html: false
   }
 
-}(window.jQuery);
+}(window.jQuery);