Fix the insertion of multiple domains as wildcard

[rdwebdesign]

What does this PR aim to accomplish?

Fix #3257

When selecting the "Add domain as wildcard" checkbox with multiple domains, only the first one was changed into a wildcard regex.

How does this PR accomplish the above?

Changing kind variable from "exact" to "regex" only after the loop.

The issue happened because the previous code were modifying this variable inside the loop, but after the first domain, the check failed (the kind was wrongly changed before all domains were parsed) and the rest of the domains were not changed into wildcards.

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