Backends: OSX: Fix KeyPadEnter on MacOS. (#3554)

backends/imgui_impl_osx.mm

@@ -18,6 +18,7 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2020-10-28: Inputs: Added a fix for handling keypad-enter key.
 //  2020-05-25: Inputs: Added a fix for missing trackpad clicks when done with "soft tap".
 //  2019-12-05: Inputs: Added support for ImGuiMouseCursor_NotAllowed mouse cursor.
 //  2019-10-11: Inputs:  Fix using Backspace key.
@@ -72,7 +73,7 @@ bool ImGui_ImplOSX_Init()
     io.KeyMap[ImGuiKey_Space]           = 32;
     io.KeyMap[ImGuiKey_Enter]           = 13;
     io.KeyMap[ImGuiKey_Escape]          = 27;
-    io.KeyMap[ImGuiKey_KeyPadEnter]     = 13;
+    io.KeyMap[ImGuiKey_KeyPadEnter]     = 3;
     io.KeyMap[ImGuiKey_A]               = 'A';
     io.KeyMap[ImGuiKey_C]               = 'C';
     io.KeyMap[ImGuiKey_V]               = 'V';

docs/CHANGELOG.txt

@@ -64,6 +64,7 @@ Other Changes:
 - Backends: OpenGL3: Use glGetString(GL_VERSION) query instead of glGetIntegerv(GL_MAJOR_VERSION, ...)
   when the later returns zero (e.g. Desktop GL 2.x). (#3530) [@xndcn]
 - Backends: OpenGL3: Backup and restore GL_PRIMITIVE_RESTART state. (#3544) [@Xipiryon]
+- Backends: OSX: Fix keypad-enter key not working on MacOS. (#3554) [@rokups, @lfnoise]
 - Examples: Apple+Metal: Consolidated/simplified to get closer to other examples. (#3543) [@warrenm]
 - Docs: Split examples/README.txt into docs/BACKENDS.md and docs/EXAMPLES.md improved them.
 - Docs: Consistently renamed all occurences of "binding" and "back-end" to "backend" in comments and docs.