Fix typo

Author: rstanuwijaya

src/browser/base/content/zen-keysets.inc.xhtml

@@ -50,7 +50,7 @@
 
   <!-- Tab search commands -->
   <command id="cmd_zenSearchTabs" />
-  <command id="cmd_zenBackSearchTabs" />
+  <command id="cmd_zenBackwardSearchTabs" />
 </commandset>
 
 <keyset id="zenKeyset"></keyset>

src/zen/common/zen-sets.js

@@ -104,7 +104,7 @@ document.addEventListener(
               gURLBar.view.selectBy(1);
             }
             break;          
-          case 'cmd_zenBackSearchTabs':
+          case 'cmd_zenBackwardSearchTabs':
             if (!gURLBar.view.isOpen) {
               gURLBar.search("% ");
             } else {

src/zen/kbs/ZenKeyboardShortcuts.mjs

@@ -750,13 +750,13 @@ class ZenKeyboardShortcutsLoader {
 
     newShortcutList.push(
       new KeyShortcut(
-        'zen-back-search-tabs',
+        'zen-backward-search-tabs',
         'Q',
         '',
         'searchAndFind',
         KeyShortcutModifiers.fromObject({ accel: false, alt: true, shift: true }),
-        'cmd_zenBackSearchTabs',
-        'zen-back-search-shortcut-tabs'
+        'cmd_zenBackwardSearchTabs',
+        'zen-backward-search-shortcut-tabs'
       )
     );