fix(CSS): correct alert dismiss styling

Author: Ryan A. Johnson

src/helix-ui/styles/alert.less

@@ -68,13 +68,7 @@
   &__dismiss {
     background-color: transparent;
     border: none;
-    display: flex;
-    flex-direction: column;
-    padding: 0.875em 1em;
-
-    hx-icon {
-      height: 0.75em;
-      width: 0.75em;
-    }
+    line-height: 1;
+    padding: 1rem;
   }
 }

src/helix-ui/styles/reset.less

@@ -32,3 +32,9 @@ a {
 fieldset {
   border: none;
 }
+
+button {
+  color: inherit;
+  font: inherit;
+  margin: 0;
+}