Remove uses of 'cols' and 'rows' preferences
The use of 'cols' and 'rows' preferences have been removed from the extension PageForms by replacing them with the required values.
The 'editwidth' option has also been removed as it has become obsolete.
Bug: T155153
Change-Id: I967a0c74782a64b71bf8a26c3e0380ff5c269fbd