Merge branch 'master' into docking

# Conflicts:
#	backends/imgui_impl_dx12.cpp
#	backends/imgui_impl_glfw.cpp
#	backends/imgui_impl_sdl.cpp
#	imgui_internal.h
#	imgui_widgets.cpp

misc/freetype/imgui_freetype.cpp

@@ -368,7 +368,7 @@ struct ImFontBuildSrcGlyphFT
     uint32_t            Codepoint;
     unsigned int*       BitmapData;         // Point within one of the dst_tmp_bitmap_buffers[] array
 
-    ImFontBuildSrcGlyphFT() { memset(this, 0, sizeof(*this)); }
+    ImFontBuildSrcGlyphFT() { memset((void*)this, 0, sizeof(*this)); }
 };
 
 struct ImFontBuildSrcDataFT