Make compose path relative

src/utils/open-compose.js

@@ -1,7 +1,7 @@
 import { t } from '@lingui/core/macro';
 
 export default function openCompose(opts) {
-  const url = URL.parse('/compose/', window.location);
+  const url = URL.parse('./compose/', window.location);
   const { width: screenWidth, height: screenHeight } = window.screen;
   const left = Math.max(0, (screenWidth - 600) / 2);
   const top = Math.max(0, (screenHeight - 450) / 2);