Improve the styling of search initialization errors.

Signed-off-by: Kalle Struik <kalle@kallestruik.nl>

res/css/_components.scss

@@ -143,7 +143,7 @@
 @import "./views/elements/_AddressSelector.scss";
 @import "./views/elements/_AddressTile.scss";
 @import "./views/elements/_CopyableText.scss";
-@import "./views/elements/_DesktopBuildsNotice.scss";
+@import "./views/elements/_SearchWarning.scss";
 @import "./views/elements/_DesktopCapturerSourcePicker.scss";
 @import "./views/elements/_DialPadBackspaceButton.scss";
 @import "./views/elements/_DirectorySearchBox.scss";

res/css/views/elements/_SearchWarning.scss

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-.mx_DesktopBuildsNotice {
+.mx_SearchWarning {
     text-align: center;
     padding: 0 16px;