Combo: Offset popup position by border size so that a double border isn't so visible. (#707)

imgui.cpp

@@ -8880,12 +8880,12 @@ bool ImGui::BeginCombo(const char* label, const char* preview_value, ImVec2 popu
         // Position our combo ABOVE because there's more space to fit! (FIXME: Handle in Begin() or use a shared helper. We have similar code in Begin() for popup placement)
         popup_y1 = ImClamp(frame_bb.Min.y - popup_size.y, style.DisplaySafeAreaPadding.y, frame_bb.Min.y);
         popup_y2 = frame_bb.Min.y;
-        SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Min.y), ImGuiCond_Always, ImVec2(0.0f, 1.0f));
+        SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Min.y + window->WindowBorderSize), ImGuiCond_Always, ImVec2(0.0f, 1.0f));
     }
     else
     {
         // Position our combo below
-        SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Max.y), ImGuiCond_Always, ImVec2(0.0f, 0.0f));
+        SetNextWindowPos(ImVec2(frame_bb.Min.x, frame_bb.Max.y - window->WindowBorderSize), ImGuiCond_Always, ImVec2(0.0f, 0.0f));
     }
     SetNextWindowSize(ImVec2(popup_size.x, popup_y2 - popup_y1), ImGuiCond_Appearing);
     PushStyleVar(ImGuiStyleVar_WindowPadding, style.FramePadding);