"the Telerik UI installation now comes with a folder namedEditorDialogs which contains all editor's dialogs files'
"You can configure RadEditor to use its external dialog files by copying the EditorDialogs folder......"
Our RadEditorProvider contains a Dialogs folder, not EditorDialogs. Also, inside the Dialogs folder are 4 files (DocumentManager.ascx, LinkManager.ascx, RenderTemplate.aspx, SaveTemplate.aspx).
Of these 4 documents, LinkManager.ascx is the only one that has the <tr> <td> structure shown on the linked instructions page. It appears we don't have the customizable ImageManager file where I could alter the Constrain default?