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An Option to set the width of the panel. Atm it's always 17em, but for some cases this is too/less wide
Panels have a fixed width of 17em (272 pixels) which is narrow enough to still show some of the page contents when open to make clicking out to close easy, and still looks good on wider tablet or desktop screens. The styles to set widths on panels are fairly complex but these can be overridden with CSS as needed.