PdfFormatProvider: Add support for the "Automatically resize to fit contents" table property.

Import a document that contains a picture content control and the following error occurs: 

Telerik.Windows.Documents.Flow.Model.Annotations.StructuredDocumentTags.Builders.SdtBuilderFailureException: 'Picture control cannot be used in selection that contains any non-image content, or more than a single image.'

NullReferenceException when inserting a document containing a table with a document variable having a line break (\n) in its value.

Importing a DOCX file containing a footer with a content control that contains more than one paragraph leads to exporting an empty document without any errors indicating the problem.

NotSupportedImageFormatException is thrown during DOCX to PDF conversion in Linux.

Import/export strips w:colFirst and w:colLast from table's <w:permStart> elements.

Expected:

Actual: