Use new dropdown arrow for language selector

res/css/structures/auth/_LanguageSelector.scss

@@ -24,3 +24,23 @@ limitations under the License.
     font-weight: 600;
     color: $authpage-lang-color;
 }
+
+/* TODO: Consider using this new arrow for all dropdowns */
+.mx_Auth_language .mx_Dropdown_arrow {
+    width: 10px;
+    height: 6px;
+    border: none;
+    right: 6px;
+}
+
+.mx_Auth_language .mx_Dropdown_arrow::before {
+    content: "";
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    mask: url('$(res)/img/feather-icons/dropdown-arrow.svg');
+    mask-repeat: no-repeat;
+    background: $authpage-lang-color;
+}

res/img/feather-icons/dropdown-arrow.svg

@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="10" height="6" viewBox="0 0 10 6">
+    <g fill="none" fill-rule="evenodd" stroke="#4e5054" stroke-linecap="round" stroke-width="1.3" transform="translate(1 1)">
+        <path d="m.5.5 3.85868526 3.25422271"/>
+        <path d="m8.13193273.56042139-3.77324747 3.19380132"/>
+    </g>
+</svg>