Method GetTabName

imgui_tiny_app/imgui/imgui_demo.cpp:10675–10678

As we allow to change document name, we append a never-changing document ID so tabs are stable

    // As we allow to change document name, we append a never-changing document ID so tabs are stable
    void GetTabName(MyDocument* doc, char* out_buf, size_t out_buf_size)
    {
        snprintf(out_buf, out_buf_size, "%s###doc%d", doc->Name, doc->UID);
    }

    // Display placeholder contents for the Document
    void DisplayDocContents(MyDocument* doc)