Fix tab completions

src/background/shared/completions/tabs.js

@@ -1,7 +1,9 @@
-const getCompletions = (keyword) => {
+const getCompletions = (keyword, excludePinned) => {
   return browser.tabs.query({ currentWindow: true }).then((tabs) => {
     let matched = tabs.filter((t) => {
       return t.url.includes(keyword) || t.title && t.title.includes(keyword);
+    }).filter((t) => {
+      return !(excludePinned && t.pinned);
     });
     return matched;
   });