message: Add Slider hover color just like Drag
  I feel like there should be hover color options for each different control instead of the grouped frame color to make it usable for everyone. This also would not reduce performance as all controls already check for hover state as required by the ImGUI::IsHoveredItem() API.
diff: @@ -639,6 +639,8 @@ enum ImGuiComboFlags_
  ImGuiComboFlags_HeightRegular = 1 << 2, // Max ~8 items visible (default)
  ImGuiComboFlags_HeightLarge = 1 << 3, // Max ~20 items visible
  ImGuiComboFlags_HeightLargest = 1 << 4, // As many fitting items as possible
  + ImGuiComboFlags_NoArrowButton = 1 << 5, // Display on the preview box without the square arrow button
  + ImGuiComboFlags_NoPreview = 1 << 6, // Display only a square arrow button
  ImGuiComboFlags_HeightMask_ = ImGuiComboFlags_HeightSmall | ImGuiComboFlags_HeightRegular | ImGuiComboFlags_HeightLarge | ImGuiComboFlags_HeightLargest
  };
  