An ASAN build highlighted a longstanding bug during ctrl+c operations inside various text widgets. The existing code had mismatched memory lock/unlock calls and was using the wrong allocator. Fix the code surrounding `SetClipboardData` to be correct per MSDN: https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-setclipboarddata Differential Revision: https://developer.blender.org/D15039