Don't blink the cursor if it should not be visible

Also, when stopping blinking, set the cursor's visibility to whatever it is on the underlying model. This fixes issues where the cursor would blink when there was a selection.

src/app/cursor-view.coffee

@@ -67,16 +67,16 @@ class CursorView extends View
         @css('visibility', 'hidden')
 
   toggleVisible: ->
-    @setVisible(not @visible) if @cursor.isVisible
+    @setVisible(not @visible)
 
   stopBlinking: ->
     clearInterval(@blinkInterval) if @blinkInterval
     @blinkInterval = null
-    @setVisible(true) if @cursor.isVisible
+    @setVisible(@cursor.isVisible())
 
   startBlinking: ->
     return if @blinkInterval?
-    blink = => @toggleVisible()
+    blink = => @toggleVisible() if @cursor.isVisible()
     @blinkInterval = setInterval(blink, @blinkPeriod / 2)
 
   resetBlinking: ->