message: ItemAdd(): more re-ordering of tests to match IsHovered() + comments
diff: @@ -1950,10 +1950,11 @@ bool ImGui::ItemAdd(const ImRect& bb, const ImGuiID* id)
  // Set up for public-facing IsItemHovered(). We store the result in DC.LastItemHoveredAndUsable.
  // This is roughly matching the behavior of internal-facing IsHovered()
  // - we allow hovering to be true when ActiveId==window->MoveID, so that clicking on non-interactive items such as a Text() item still returns true with IsItemHovered())
  + // - we don't expose the flatten_child feature that IsHovered() has, which is only used by the window resizing widget (may rework this)
  // FIXME-OPT: Consider moving this code to IsItemHovered() so it's only evaluated if users needs it.
  if (g.HoveredWindow == window)
  - if (IsMouseHoveringRect(bb.Min, bb.Max))
  if (g.ActiveId == 0 || (id && g.ActiveId == *id) || g.ActiveIdAllowOverlap || (g.ActiveId == window->MoveId))
  + if (IsMouseHoveringRect(bb.Min, bb.Max))
  if (IsWindowContentHoverable(window))
  window->DC.LastItemHoveredAndUsable = true;
  