fix: Reduce sensitivity of dark icon switching

fix: Layout issue in icon picker in dark mode
closes #2658

app/components/CollectionIcon.js

@@ -20,7 +20,7 @@ function ResolvedCollectionIcon({ collection, expanded, size }: Props) {
   // otherwise it will be impossible to see against the dark background.
   const color =
     ui.resolvedTheme === "dark" && collection.color !== "currentColor"
-      ? getLuminance(collection.color) > 0.12
+      ? getLuminance(collection.color) > 0.09
         ? collection.color
         : "currentColor"
       : collection.color;

app/components/ContextMenu/index.js

@@ -140,7 +140,5 @@ export const Background = styled.div`
     max-width: 276px;
     background: ${(props) => props.theme.menuBackground};
     box-shadow: ${(props) => props.theme.menuShadow};
-    border: ${(props) =>
-      props.theme.menuBorder ? `1px solid ${props.theme.menuBorder}` : "none"};
   `};
 `;