Release notes for Optimizely updates

Editors were unable to drag blocks onto content areas. A page refresh reset the functionality.

An error in validating content occurred in TinyMCE and blocks that caused the inability to publish a page (and no validation messages was displayed).

Steps to reproduce:

1. Open any page with the Content Area property.
2. Create a new `Editorial Content` block.
3. Click `Quick edit` on the newly created block.
4. Drag and drop an image from your local disk to the XHTML property.
5. Navigate to the block and check it's in the `For This Block` folder.

Expected result:

Images are created in the `For This Block` folder.

Actual result:

Images are created in the `For this page` folder.

When you add an image to the TinyMCE by using the image tool, the description is by default left empty, and thus the "alt" attribute is missing in the HTML.

If you drag and drop the same image in the editor, then the correct value for the "alt" attribute is displayed in the HTML.

Steps to reproduce:

1. Create and publish a configurable view that allows editors to create Editional blocks (that is, blocks having TinyMCE). 
2. Open the view on CM.
3. Add new > Enter required field. 
4. Enter data to Mainbody (TinyMCE property)
5. Click Save.

Steps to reproduce in CMS:

1. In Edit Mode, create a block of type Editorial
2. Add the new created block to the Large content area of the Start page
3. Use Quick Edit to edit the editorial block
4. Add some text then click Save

Actual result:

Error script : widgets.js:2 Uncaught TypeError: Cannot read property 'tagName' of null
at Object.set (widgets.js:2)
at Object._onChange (widgets.js:2)
at Object.<anonymous> (widgets.js:2)
at widgets.js:2

Expected result:

No error script.

Update TinyMCE to 4.9.11

Steps to reproduce:

1. Configure dirtyCheckInterval to 3 seconds. https://bartoszsekula.com/post/2018/09/17/how-to-change-the-delay-between-subsequent-saves-in-episerver-tinymce
2. Edit a page
3. Press enter several times quickly

Expected: To only save once 3 seconds after the last enter press.
Actual: Each enter press will save

Steps to reproduce:

1. Edit and publish a page with TinyMCE property
2. Add version gadget and switch to previous version.
3. Go to All Properties Editing. TinyMCE property should be now readonly

Actual: Editor can't copy text from property
Expected: Should be doable

If you set language to Suomi (Finland), there are incorrect texts at the Taulukko (Table) and (Sarake) Column of TinyMCE.

Selections “Lisää rivi ennen” (Add row before) and “Lisää rivi jälkeen” (Add row after) should be “Lisää sarake ennen” (Add column before) and “Lisää sarake jälkeen” (Add column after).

Enable the anchor button plugin by default.