fix: remove --_grid-colstart when removing <br>

Author: vursen

packages/form-layout/src/vaadin-form-layout-mixin.js

@@ -374,6 +374,8 @@ export const FormLayoutMixin = (superClass) =>
           if (resetColumn) {
             child.style.setProperty('--_grid-colstart', 1);
             resetColumn = false;
+          } else {
+            child.style.removeProperty('--_grid-colstart');
           }
         });
     }

packages/form-layout/test/form-layout.test.js

@@ -519,14 +519,14 @@ describe('form layout', () => {
 
     it('should update grid-column-start after adding <br>', async () => {
       const br = document.createElement('br');
-      items[0].after(br);
+      layout.insertBefore(br, items[1]);
       await nextRender(layout);
       expect(getComputedStyle(items[1]).gridColumnStart).to.equal('1');
     });
 
     it('should update grid-column-start after removing <br>', async () => {
       const br = document.createElement('br');
-      items[0].after(br);
+      layout.insertBefore(br, items[1]);
       await nextRender(layout);
 
       br.remove();