pdf backend: Ignore FullScreen PageMode catalog entry (#633)

Prior to this change, Xreader would open in full screen mode if a PDF had the
PageMode entry in its catalog dictionary set to FullScreen. As this behavior
is generally unwanted by the consumer of a PDF document, this entry is
now ignored.

backend/pdf/ev-poppler.cc

@@ -725,7 +725,9 @@ pdf_document_get_info (EvDocument *document)
 			info->mode = EV_DOCUMENT_MODE_USE_OC;
 			break;
 		case POPPLER_PAGE_MODE_FULL_SCREEN:
-			info->mode = EV_DOCUMENT_MODE_FULL_SCREEN;
+			// Ignore full screen page mode, since automatically opening
+			// in full screen mode is generally unwanted behavior
+			//info->mode = EV_DOCUMENT_MODE_FULL_SCREEN;
 			break;
 		case POPPLER_PAGE_MODE_USE_ATTACHMENTS:
 			info->mode = EV_DOCUMENT_MODE_USE_ATTACHMENTS;