feat(libreoffice): add exportNotesInMargin form field (#904)

* ExportNotesInMargin allows to export comments in margin

https://help.libreoffice.org/latest/en-US/text/shared/guide/pdf_params.html

* Resolve requested changes

Move ExportNotesInMargin above LosslessImageCompression
Remove overhead ExportNotes=true

pkg/modules/libreoffice/api/api.go

@@ -59,6 +59,10 @@ type Options struct {
 	// Optional
 	SinglePageSheets bool
 
+	// ExportNotesInMargin allows to export comments in margin.
+	// Optional
+	ExportNotesInMargin bool
+
 	// LosslessImageCompression allows turning lossless compression on or off
 	// to tweak image conversion performance.
 	// Optional