Properly apply type cast

Co-authored-by: Tom Erik Støwer <testower@gmail.com>

client/src/components/MapView/LayerControl.tsx

@@ -95,7 +95,7 @@ class LayerControl implements IControl {
     const groupInput = document.createElement('input');
     groupInput.onchange = () => {
       groupDiv.querySelectorAll('input.layer').forEach((i) => {
-        const input = i as HTMLInputElement;
+        groupDiv.querySelectorAll<HTMLInputElement>('input.layer').forEach((input) => {
         input.checked = groupInput.checked;
         const event = new Event('change');
         input.dispatchEvent(event);