NameQuick 3.0.2

Small follow-up to 3.0.1, all in the Self-Managed lane.

Fixes

• Every purchase door is one click. With the trial's renames used up, the "0 renames left" pill in the header and the "Prefer your own keys?" row under Billing both open the Self-Managed licence checkout directly. The Billing row previously could sit dead or disappear while the pane and the checkout disagreed about the offer.
• The right words in Settings search and the Billing rail. A Self-Managed trial reads about its renames, a licence holder about the licence and its receipt — not about "credit usage".
• The customer portal knows who it is for. A Self-Managed trial can no longer be sent to the managed customer portal; licence holders keep it — it is where their receipt lives.
• The About screen's support row sits properly in its card.