Fix layer selection (#1366)

## Launch Checklist

- This fixes the issue of layer selection that was introduced as part of
the migration to dnd-kit #1359
- Fixes #1364

This also adds the relevant test.

 - [x] Briefly describe the changes in this PR.
 - [x] Link to related issues.
 - [x] Write tests for all new functionality.

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/components/LayerList.tsx

@@ -336,7 +336,7 @@ type LayerListProps = LayerListContainerProps & {
 };
 
 const LayerList: React.FC<LayerListProps> = (props) => {
-  const sensors = useSensors(useSensor(PointerSensor));
+  const sensors = useSensors(useSensor(PointerSensor, { activationConstraint: { distance: 5 } }));
 
   const handleDragEnd = (event: DragEndEvent) => {
     const {active, over} = event;