Revert "Update mysqli"

This reverts commit 05cecbb41f0f2990446150bab76563c67642affd.

Conflicts:
	accountData/userhome.php
	controlpanel.php
	index.php
	login.php
	main.php
	mysqli_util.php
	register.php
	stylesheet-theme-dark.css
	stylesheet-theme-light.css

Revert "Revert "minor fix""

This reverts commit
14fb154bdf398a56b24e5b0f1409dbe51b2d1b95.