DM-7967: y-axis reversed in popup dialog too

Author: ejoliet

src/firefly/js/templates/lightcurve/LcPhaseFoldingPopup.jsx

@@ -347,7 +347,8 @@ class PhaseFoldingChart extends Component {
                     lineWidth: 1,
                     tickWidth: 1,
                     tickLength: 10,
-                    gridLineColor: '#e9e9e9'
+                    gridLineColor: '#e9e9e9',
+                    reversed: true
                 },
                 tooltip: showTooltip ? {enabled: true,
                                         formatter() {