Don't always turn on wxTE_PROCESS_ENTER in wxOSX

This style was unconditionally used for all multiline controls for some
reason, meaning that wxEVT_TEXT_ENTER could be received even for the controls
not using wxTE_PROCESS_ENTER explicitly, which was unexpected.

Don't do this any more to conform to the expected behaviour.

Also do use wxTE_PROCESS_ENTER for the text control supposed to allow handling
"Enter" in the text sample: surprisingly, it didn't have this style before,
although it was clearly supposed to.

Closes #1913.

docs/changes.txt

@@ -195,3 +195,4 @@ wxOSX/Cocoa:
 - Provide native implementation of wxStandardPaths (Tobias Taschner).
 - Add wxTE_{RIGHT,CENTER} support for multiline wxTextCtrl (Andreas Falkenhahn).
 - Don't leave wxSlider labels shown when the slider itself is hidden.
+- Don't generate wxEVT_TEXT_ENTER for controls without wxTE_PROCESS_ENTER.

samples/text/text.cpp

@@ -1160,7 +1160,7 @@ MyPanel::MyPanel( wxFrame *frame, int x, int y, int w, int h )
     m_tab->SetClientData((void *)wxT("tab"));
 
     m_enter = new MyTextCtrl( this, 100, wxT("Multiline, allow <ENTER> processing."),
-      wxPoint(180,170), wxSize(200,70), wxTE_MULTILINE);
+      wxPoint(180,170), wxSize(200,70), wxTE_MULTILINE | wxTE_PROCESS_ENTER );
     m_enter->SetClientData((void *)wxT("enter"));
 
     m_textrich = new MyTextCtrl(this, wxID_ANY, wxT("Allows more than 30Kb of text\n")

src/osx/textctrl_osx.cpp

@@ -103,14 +103,6 @@ bool wxTextCtrl::Create( wxWindow *parent,
     if ( !wxTextCtrlBase::Create( parent, id, pos, size, style & ~(wxHSCROLL | wxVSCROLL), validator, name ) )
         return false;
 
-    if ( m_windowStyle & wxTE_MULTILINE )
-    {
-        // always turn on this style for multi-line controls
-        m_windowStyle |= wxTE_PROCESS_ENTER;
-        style |= wxTE_PROCESS_ENTER ;
-    }
-
-
     SetPeer(wxWidgetImpl::CreateTextControl( this, GetParent(), GetId(), str, pos, size, style, GetExtraStyle() ));
 
     MacPostControlCreate(pos, size) ;