Locations: Rework the Crossfade transition

Add a start value for the scale to make it more elegant

src/animations/crossfade.js

@@ -4,14 +4,20 @@ import { quartOut } from 'svelte/easing'
 // Crossfade transition
 export const [send, receive] = crossfade({
     duration: d => Math.sqrt(d * 200),
-    fallback (node, params) {
+    fallback: (node, params) => {
+        const {
+            duration = 600,
+            easing = quartOut,
+            start = 0.85
+        } = params
         const style = getComputedStyle(node)
         const transform = style.transform === 'none' ? '' : style.transform
+        const sd = 1 - start
         return {
-            duration: 600,
-            easing: quartOut,
-            css: t => `
-                transform: ${transform} scale(${t});
+            duration,
+            easing,
+            css: (t, u) => `
+                transform: ${transform} scale(${1 - (sd * u)});
                 opacity: ${t}
             `
         }