Merge branch 'viewport' into docking

# Conflicts:
#	examples/example_allegro5/main.cpp
#	examples/example_win32_directx9/main.cpp

examples/example_apple_opengl2/main.mm

@@ -244,14 +244,14 @@
     //io.ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;     // Enable Keyboard Controls
     io.ConfigFlags |= ImGuiConfigFlags_DockingEnable;           // Enable Docking
 
+    // Setup Dear ImGui style
+    ImGui::StyleColorsDark();
+    //ImGui::StyleColorsClassic();
+
     // Setup Platform/Renderer bindings
     ImGui_ImplOSX_Init();
     ImGui_ImplOpenGL2_Init();
 
-    // Setup Style
-    ImGui::StyleColorsDark();
-    //ImGui::StyleColorsClassic();
-
     // Load Fonts
     // - If no fonts are loaded, dear imgui will use the default font. You can also load multiple fonts and use ImGui::PushFont()/PopFont() to select them.
     // - AddFontFromFileTTF() will return the ImFont* so you can store it if you need to select the font among multiple.