Really fix recently broken accelerators handling in menu items.

As wxAcceleratorEntry::Create() now expects the full menu item label, just
pass GetItemLabel() to it in wxMenuItemBase::GetAccel() instead of half-
parsing it ourselves there.

Closes #12794.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66430 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/menucmn.cpp

@@ -114,9 +114,7 @@ wxMenuItemBase::~wxMenuItemBase()
 
 wxAcceleratorEntry *wxMenuItemBase::GetAccel() const
 {
-    const wxString accel = GetItemLabel().AfterFirst(wxT('\t'));
-
-    return accel.empty() ? NULL : wxAcceleratorEntry::Create(accel);
+    return wxAcceleratorEntry::Create(GetItemLabel());
 }
 
 void wxMenuItemBase::SetAccel(wxAcceleratorEntry *accel)