title: tinymce Link & Image buttons issue
body: <p>I've install TinyMCE v4.1.9 text editor. so I found hyperlink and Image buttons ara missing, so I insert the plugins for both of them and they both appear but, they just appear only if I add one plugin (when I add Image --> appear | when I add hyperlink --> appear | when I add both, when the hyperlink is the last, link button appear and image disappear and if the image is the last, same thing, the image button appear and link disappear).</p>
  
  <p>here are my codes:</p>
  
  <pre><code>tinymce.init({
          selector: "textarea#core",
          language : 'ar',
          directionality : 'rtl',
          plugins: "autoresize",
          fontsize_formats: "14px",
          content_css : "css/custom_content.min.css",
          theme_advanced_font_sizes: "10px,12px,13px,14px,16px,18px,20px",
          font_size_style_values : "10px,12px,13px,14px,16px,18px,20px",
          plugins: "link",
          plugins: "image",
          theme: 'modern'
  </code></pre>
  
  <p>help please</p>