Sitecore SXA - 'Open in Overlay' checkbox missing?

If any of you have faced this issue that Sitecore SXA's feature [Open in Overlay] (Note: The original article is no longer available online) is missing then this might help you.

Fix:

The root cause of the issue was that the rich text editor was not using the customized HyperlinkManager and was using the default Telerik HyperlinkManager, to fix this please do the following:

• Open the \**Website Root**\sitecore\shell\Controls\Rich Text Editor\EditorPage.aspx file
• Add the following attribute to the <telerik:radeditor ID="Editor" inside of the EditorPage.aspx file
  • ExternalDialogsPath="~/sitecore/shell/controls/rich text editor/Dialogs/"
• Clear browser cache

Sitecore Support reference for this fix is # 228508

Note that I was using Sitecore SXA version 1.8.1 when I got this issue.