Fixes close tabs to the left/right

when you have multiple tab pages

Resolves brave#9789

Auditors: @bsclifton

Test Plan:

test/tab-components/tabPagesTest.js

@@ -3,6 +3,7 @@
 const Brave = require('../lib/brave')
 const appConfig = require('../../js/constants/appConfig')
 const settings = require('../../js/constants/settings')
+const messages = require('../../js/constants/messages')
 const {
   urlInput,
   newFrameButton,
@@ -67,6 +68,15 @@ describe('tab pages', function () {
         .waitForElementCount(tabsTabs, numTabsPerPage)
     })
 
+    it('closing tabs with close-to-left option', function * () {
+      yield this.app.client
+        .click(newFrameButton)
+        .waitForElementCount(tabPage, 2)
+        .ipcSend(messages.SHORTCUT_CLOSE_OTHER_FRAMES, 21, false, true)
+        .waitForElementCount(tabPage, 0)
+        .waitForElementCount(tabsTabs, 1)
+    })
+
     describe('allows changing to tab pages', function () {
       beforeEach(function * () {
         // Make sure there are 2 tab pages