Navigating between HikaSerial/Serials pages generates empty lines.

-- HikaShop version -- : 4.3.0
-- HikaSerial version -- : 3.1.1
-- Joomla version -- : 3.9.22
-- PHP version -- : 7.2

Hi

I have noticed today, strange behaviour.
I was adding manually serials to the list. At some point I have noticed empty lines between other lines. As I have 7 pages of serials I was checking on other pages if I can find more empty lines. I was very surprised when I found that by doing that empty lines were added to the list. So, every time I changed page empty lines were added.

Hi Jerome

Yes, on demo page it is wrong as well. Very easy to reproduce:
1. Add to the pack more then 40 lines, then you will see 3 pages in the page navigation.
2. Now jumping from page to page, each time system is adding two empty lines.

HI

I have explained in very details above how to reproduce it.
Please go now to the demo HikaSerial and try. I have created 25 serials. There is two pages of serials now. Every time you jump from one page to another empty lines are added to the list.

One more finding. Once you there logged in it will work ok. But try to add couple of serials, then you will see the problem.

Ok, this would be fix for now to avoid extra lines added.
Thanks for looking into it.