Move hidden input to the same position with cursor view.

This is required to make IME's input bubble follow the cursor.

src/editor.coffee

@@ -88,6 +88,7 @@ class Editor extends View
     @configure()
     @bindKeys()
     @handleEvents()
+    @handleImeEvents()
     @cursorViews = []
     @selectionViews = []
     @pendingChanges = []
@@ -696,6 +697,10 @@ class Editor extends View
       else
         @gutter.addClass('drop-shadow')
 
+  handleImeEvents: ->
+    @on 'cursor:moved', =>
+      @hiddenInput.offset(@getCursorView().offset())
+
   selectOnMousemoveUntilMouseup: ->
     lastMoveEvent = null
     moveHandler = (event = lastMoveEvent) =>