Slides: Duplicate slide with alt-drag

Thanks for the feedback, @Peter_Green1 . We’ll pass this onto the Slides team for future consideration 🙂

I am BEGGING FOR THIS FEATURE. It’s such a common hotkey in literally all other design software (including Figma Design!!) and this has actually screwed me over several times when I’ve alt-dragged a slide, assuming it had been duplicated, and it hadn’t. 

A year later and this still isn’t implemented?  This has literally ruined presentations for me and it may cause me to never use figma slides anymore.  It is simply too risky.