Update wxWidgets to 3.1.0

From wxWidgets master 81570ae070b35c9d52de47b1f14897f3ff1a66c7.

include/wx/defs.h -- __w64 warning disable patch by comex brought forward.

include/wx/msw/window.h -- added GetContentScaleFactor() which was not implemented on Windows but is necessary for wxBitmap scaling on Mac OS X so it needs to work to avoid #ifdef-ing the code.

src/gtk/window.cpp -- Modified DoSetClientSize() to direct call wxWindowGTK::DoSetSize() instead of using public wxWindowBase::SetSize() which now prevents derived classes (like wxAuiToolbar) intercepting the call and breaking it. This matches Windows which does NOT need to call DoSetSize internally. End result is this fixes Dolphin's debug tools toolbars on Linux.

src/osx/window_osx.cpp -- Same fix as for GTK since it has the same issue.

src/msw/radiobox.cpp -- Hacked to fix display in HiDPI (was clipping off end of text).

Updated CMakeLists for Linux and Mac OS X. Small code changes to Dolphin to fix debug error boxes, deprecation warnings, and retain previous UI behavior on Windows.

Externals/wxWidgets3/include/wx/debug.h

@@ -10,9 +10,7 @@
 #ifndef _WX_DEBUG_H_
 #define _WX_DEBUG_H_
 
-#if !defined(__WXWINCE__)
-    #include  <assert.h>
-#endif // systems without assert.h
+#include  <assert.h>
 
 #include <limits.h>          // for CHAR_BIT used below
 
@@ -256,11 +254,18 @@ extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
     // If possible, we prefer to define it as a macro rather than as a function
     // to open the debugger at the position where we trapped and not inside the
     // trap function itself which is not very useful.
-    #if wxCHECK_VISUALC_VERSION(7)
+    #ifdef __VISUALC__
         #define wxTrap() __debugbreak()
-    #else
+    #elif defined(__GNUC__)
+        #if defined(__i386) || defined(__x86_64)
+            #define wxTrap() asm volatile ("int $3")
+        #endif
+    #endif
+
+    #ifndef wxTrap
+        // For all the other cases, use a generic function.
         extern WXDLLIMPEXP_BASE void wxTrap();
-    #endif // Win VisualC
+    #endif
 
     // Global flag used to indicate that assert macros should call wxTrap(): it
     // is set by the default assert handler if the user answers yes to the
@@ -275,34 +280,44 @@ extern WXDLLIMPEXP_BASE void wxOnAssert(const char *file,
     // reasons (if we changed its return type, we'd need to change wxApp::
     // OnAssertFailure() too which would break user code overriding it), hence
     // the need for the ugly global flag.
-    #define wxASSERT_MSG(cond, msg)                                           \
+    #define wxASSERT_MSG_AT(cond, msg, file, line, func)                      \
         wxSTATEMENT_MACRO_BEGIN                                               \
             if ( wxTheAssertHandler && !(cond) &&                             \
-                    (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__,           \
-                                #cond, msg), wxTrapInAssert) )                \
+                    (wxOnAssert(file, line, func, #cond, msg),                \
+                     wxTrapInAssert) )                                        \
             {                                                                 \
                 wxTrapInAssert = false;                                       \
                 wxTrap();                                                     \
             }                                                                 \
         wxSTATEMENT_MACRO_END
 
+    // A version asserting at the current location.
+    #define wxASSERT_MSG(cond, msg) \
+        wxASSERT_MSG_AT(cond, msg, __FILE__, __LINE__, __WXFUNCTION__)
+
     // a version without any additional message, don't use unless condition
     // itself is fully self-explanatory
     #define wxASSERT(cond) wxASSERT_MSG(cond, (const char*)NULL)
 
     // wxFAIL is a special form of assert: it always triggers (and so is
     // usually used in normally unreachable code)
-    #define wxFAIL_COND_MSG(cond, msg)                                        \
+    #define wxFAIL_COND_MSG_AT(cond, msg, file, line, func)                   \
         wxSTATEMENT_MACRO_BEGIN                                               \
             if ( wxTheAssertHandler &&                                        \
-                    (wxOnAssert(__FILE__, __LINE__, __WXFUNCTION__,           \
-                                cond, msg), wxTrapInAssert) )                \
+                    (wxOnAssert(file, line, func, #cond, msg),                \
+                     wxTrapInAssert) )                                        \
             {                                                                 \
                 wxTrapInAssert = false;                                       \
                 wxTrap();                                                     \
             }                                                                 \
         wxSTATEMENT_MACRO_END
 
+    #define wxFAIL_MSG_AT(msg, file, line, func) \
+        wxFAIL_COND_MSG_AT("Assert failure", msg, file, line, func)
+
+    #define wxFAIL_COND_MSG(cond, msg) \
+        wxFAIL_COND_MSG_AT(cond, msg, __FILE__, __LINE__, __WXFUNCTION__)
+
     #define wxFAIL_MSG(msg) wxFAIL_COND_MSG("Assert failure", msg)
     #define wxFAIL wxFAIL_MSG((const char*)NULL)
 #else // !wxDEBUG_LEVEL
@@ -404,14 +419,7 @@ extern void WXDLLIMPEXP_BASE wxAbort();
 
  It may be used both within a function and in the global scope.
 */
-#if defined(__WATCOMC__)
-    /* avoid "unused symbol" warning */
-    #define wxCOMPILE_TIME_ASSERT(expr, msg) \
-        class wxMAKE_UNIQUE_ASSERT_NAME { \
-          unsigned int msg: expr; \
-          wxMAKE_UNIQUE_ASSERT_NAME() { wxUnusedVar(msg); } \
-        }
-#elif defined( __VMS )
+#if defined( __VMS )
 namespace wxdebug{
 
 // HP aCC cannot deal with missing names for template value parameters