Fixed serchmode persistence and missing slot 0 tab

src/manifest.json

@@ -1,7 +1,7 @@
 {
     "manifest_version": 2,
     "name": "Tab Search and Manage",
-    "version": "1.2.6",
+    "version": "1.2.8",
     "description": "This plugin can search, drag-n-drop ordering, and (un)hide all or some tabs.",
 
   "applications": {
@@ -18,7 +18,8 @@
 
   "permissions": [
       "tabs",
-      "tabHide"
+      "tabHide",
+      "storage"
    ],
 
   "browser_action": {