Don't mirror wxStyleTextCtrl under RTL locales

Not onlu has Scintilla no support for RTL languages, it is rendered into
a mirrored DC on Windows and so guaranteed unreadable and unsable. Fix
it by explicitly setting the window's layout direction to LTR.

(cherry picked from commit d8a90b4606)

src/stc/stc.cpp

@@ -222,6 +222,9 @@ bool wxStyledTextCtrl::Create(wxWindow *parent,
     // Make sure it can take the focus
     SetCanFocus(true);
 
+    // STC doesn't support RTL languages at all
+    SetLayoutDirection(wxLayout_LeftToRight);
+
     return true;
 }
 

src/stc/stc.cpp.in

@@ -222,6 +222,9 @@ bool wxStyledTextCtrl::Create(wxWindow *parent,
     // Make sure it can take the focus
     SetCanFocus(true);
 
+    // STC doesn't support RTL languages at all
+    SetLayoutDirection(wxLayout_LeftToRight);
+
     return true;
 }