add after install to Live reload for clarity

Author: tophf

src/_locales/en/messages.json

@@ -743,6 +743,10 @@
     "message": "See a full list of rules",
     "description": "Stylelint or CSSLint rules label added immediately before a link"
   },
+  "liveReloadAfterInstall": {
+    "message": "Live reload after installation",
+    "description": "The alternative label of \"Live reload\" checkbox (liveReloadLabel translation key) for a style that wasn't installed yet"
+  },
   "liveReloadError": {
     "message": "An error occurred while watching the file",
     "description": "The label of live-reload error"

src/install-usercss/index.js

@@ -126,6 +126,8 @@ setTimeout(() => !cm && showSpinner($id('header')), 200);
   updateMeta();
   if (dup) {
     ($(`[name="ss-scheme"][value="${dup.preferScheme}"]`) || {}).checked = true;
+  } else {
+    $('.live-reload span').textContent = t('liveReloadAfterInstall');
   }
   for (let type of ['in', 'ex']) {
     const el = $id('ss-' + (type += 'clusions'));