SHE came, she saw, she conquered. Former actress Meghan Markle took Down Under by storm. Four countries, 16 days, 41 outfit changes and 76 engagements later the Duchess of Sussex passed her first big royal test with flying colours. No surprise she is now being dubbed The Duchess of Success. Not for her the rictus grin and stilted performance of other royal tours — this was pure Hollywood magic. It was Meghan’s first international tour with husband Harry since their wedding in May. And she charmed her way through public walkabouts, formal dinners, hugs with kids and formidable speeches. The pregnant Duchess even baked banana bread for her Aussie hosts and did yoga at 4am when the jet lag kicked in.The Fijians and Tongans were delighted the royals had come to town, while the Aussies couldn’t get enough of Meghan and the Kiwis went wild, too. On the tour’s own merits, she did a great job and didn’t put a foot wrong — even more impressive considering she only made her public debut with Harry just over a year ago. Since then Meghan has changed the face of The Firm for ever, and has made Prince Harry incredibly happy. The…