Remember last used sort column/direction on Local DNS/CNAME tables

[yubiuser]

In raising this issue, I confirm the following:

• I have read and understood the contributors guide.
• The issue I am reporting can be replicated.
• The issue I am reporting isn't a duplicate (see FAQs, closed issues, and open issues).

How familiar are you with the the source code relevant to this issue?:

1

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Expected behaviour:

Local DNS Records and CNAME table should remember last used sort order.

Actual behaviour:

Local DNS Records and CNAME table don't remember last used sort order.

This is due to not saving the information in the local browser's storage.

Troubleshooting undertaken, and/or other relevant information:

Could be implemented similar to #1332

[yubiuser]

Closed by pihole web 5.2
https://github.com/pi-hole/AdminLTE/releases/tag/v5.2