Fixed creating history list

Fixed creating history list

[Issue#]    https://bugs.tizen.org/jira/browse/TT-159
[Problem]   "Close Tabs" function is not implemented in Tab Manager.
[Cause]     N/A
[Solution]  Added closeAllTabs, closeTabsClicked functions. Added boolean
            'editMode' variable that conditions action in _thumbSelected function.
            Added callback to make 'X' icon and '[OK] to close' visible.
[Verify]    Launch browser > Add tabs > Tab manager > Close Tabs
            Check if 'Close all' button works properly
            Check if closing selected item works properly

Change-Id: I98453027ad3ccfa797ab94e1e2c3ffa67f65d28f