Close Tabs button in Tab Manager

Close Tabs button in Tab Manager

[Issue]        https://bugs.tizen.org/jira/browse/TT-219
[Problem]      "Close Tabs" button in Tab Manager does not return to
               "Close Tabs" from "Close all"
[Solution]     Found that signals created in TabUI arent called, while
               signals from SimpleUI are. Copied code that is responsible
               for text change to right location.
[Verification] Open tabs manager. Click "Close Tabs" button. Either
               close a tab, click "Close All" or exit from Tab
               Manager. Reopen Tab Manager.

Change-Id: Iba4ab9aa916cf39a6d3e919a7215c5c265e597aa