add missing win32 constant for old win sdk

Zhao Yuhang

2025-03-11 c00e986f38dbc4843d92cc76a385f826658c1e03

 src/core/contexts/win32windowcontext.cpp

@@ -41,6 +41,10 @@
#  define DWM_BB_ENABLE 0x00000001
#endif

#ifndef ABM_GETAUTOHIDEBAREX
#  define ABM_GETAUTOHIDEBAREX 0x0000000b
#endif

namespace QWK {

    enum IconButtonClickLevelFlag {