Added ImGuiMod_Shortcut which is ImGuiMod_Super on Mac and ImGuiMod_Ctrl otherwise. (#456)

docs/CHANGELOG.txt

@@ -124,6 +124,7 @@ Other Changes:
   bar boundaries (bug in 1.88). (#5652).
 - Tabs: Enforcing minimum size of 1.0f, fixed asserting on zero-tab widths. (#5572)
 - Window: Fixed a potential crash when appending to a child window. (#5515, #3496, #4797) [@rokups]
+- IO: Added ImGuiMod_Shortcut which is ImGuiMod_Super on Mac and ImGuiMod_Ctrl otherwise. (#456)
 - IO: Added ImGuiKey_MouseXXX aliases for mouse buttons/wheel so all operations done on ImGuiKey
   can apply to mouse data as well. (#4921)
 - Menus: Fixed incorrect sub-menu parent association when opening a menu by closing another.

imgui.h

@@ -1459,6 +1459,11 @@ enum ImGuiKey : int
     ImGuiMod_Alt                    = 1 << 14, // Option/Menu
     ImGuiMod_Super                  = 1 << 15, // Cmd/Super/Windows
     ImGuiMod_Mask_                  = 0xF000,
+#if defined(__APPLE__)
+    ImGuiMod_Shortcut               = ImGuiMod_Super,
+#else
+    ImGuiMod_Shortcut               = ImGuiMod_Ctrl,
+#endif
 
     // [Internal] Prior to 1.87 we required user to fill io.KeysDown[512] using their own native index + the io.KeyMap[] array.
     // We are ditching this method but keeping a legacy path for user code doing e.g. IsKeyPressed(MY_NATIVE_KEY_CODE)