Fix text text changed events sending in OS X combo box and text control.

Don't duplicate needlessly wxTextEntry functionality in wxTextCtrl.

Don't clear the combobox text entry part twice in wxComboBox::DoClear(), it is
supposed to only clear the item container contents as the base class Clear()
already calls wxTextEntry::Clear().

Do send text updated events from wxTextEntry itself as it applies to
wxComboBox just as well as to wxTextCtrl.

The unit tests now pass under wxOSX/Cocoa, not breaking them again would be
appreciated.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63881 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/textctrl_osx.cpp

@@ -79,7 +79,6 @@ void wxTextCtrl::Init()
     m_dirty = false;
 
     m_privateContextMenu = NULL;
-    m_triggerUpdateEvents = true ;
 }
 
 wxTextCtrl::~wxTextCtrl()
@@ -289,26 +288,6 @@ wxString wxTextCtrl::GetLineText(long lineNo) const
     return GetTextPeer()->GetLineText(lineNo) ;
 }
 
-void wxTextCtrl::Remove(long from, long to)
-{
-    wxTextEntry::Remove(from, to);
-    if ( m_triggerUpdateEvents )
-        SendTextUpdatedEvent();
-}
-
-void wxTextCtrl::WriteText(const wxString& str)
-{
-    wxTextEntry::WriteText( str ) ;
-    if ( m_triggerUpdateEvents )
-        SendTextUpdatedEvent();
-}
-
-void wxTextCtrl::Clear()
-{
-    wxTextEntry::Clear() ;
-    SendTextUpdatedEvent();
-}
-
 void wxTextCtrl::Copy()
 {
     if (CanCopy())