update limit of elemets shown in each search section

mobile/lib/core/constants.dart

@@ -67,7 +67,7 @@ const defaultCityRadius = 10.0;
 
 const galleryGridSpacing = 2.0;
 
-const kSearchSectionLimit = 7;
+const kSearchSectionLimit = 9;
 
 const iOSGroupID = "group.io.ente.frame.SlideshowWidget";