Editor chrashes current Chrome

[r0b3n]

Steps to reproduce

1. Go to ​http://nightly.ckeditor.com/17-05-29-06-08/full/samples/ using latest Google Chrome
2. Activate Souce Code view
3. Paste following HTML Code:

<h1>Most Valuable Player&#160;| 1. Bundesliga Frauen - Saison
2015/16</h1>
<div>
  <input class="ui:include" type="button" value="/cms/components/mvp_1blf_201516" disabled="true"/>
</div>

4. Switch back to WYSIWYG-Mode

Expected result

Editor is usable.

Actual result

Editor crashes Chrome tab with 100% CPU load. Tab needs to be killed with chrome task manager.

Other details (browser, OS, CKEditor version, installed plugins)

Reported by customer using current stable Windows Google Chrome. Edge and FF seem fine. Reproducable on Chrome Version 58.0.3029.110 (64-bit) running latest MacOS. The bug occurs with CKEditor 4.6.1 and also 4.7.0 and in the nightly demo.

[r0b3n]

Forgot step 5 to reproduce: Click on editor content.

[Jakub Ś]

DUP of #17003