Help Wanted

• Mac: imgui_impl_osx.cpp need some love (#1873)

• Mac, iOS: Example_apple/ has been unmaintained, has too much difference from other examples+binding needs to be reworked.

• Mobile, Web: Wanted: Make sure the existing OpenGL renderers are compatible with OpenGL ES 2/3 or write separate renderers.

• Mobile: imgui_impl_ios.cpp Platform Binding+Example for iOS (+ use existing renderer).

• Mobile: imgui_impl_android.cpp Platform Binding+Example for Android (+ use existing renderer).

• Web: imgui_impl_emscripten.cpp Platform Binding+Example for Emscripten (+ use existing renderer to create a new example). (#336)

• DirectX12 bindings needs multi-viewport support (see Viewport branch and #1542).

• Vulkan bindings needs to fix multi-viewport support (see Viewport branch and #1542): currently has Present issues.

• GLFW: implement/solve https://github.com/glfw/glfw/issues/427 in GLFW to add missing diagonal resize mouse cursors. GLFW: implement/solve https://github.com/glfw/glfw/issues/1236 in GLFW to allow for portable multi-viewport

• GLFW: implement/solve https://github.com/glfw/glfw/pull/989 in GLFW to allow for portable multi-viewport support