Description:
see steps to reproduce

Steps to Reproduce:
1. Launch Calc
2. Create whatever data is used for the chart, and select the range.
2. [Insert]->[Chart] from Main menu.
3. [Finish] in the Chart Wizard.
4. Open [Properties] sidebar for the chart.
5. For comparison, uncheck [Elements]-[Legend]-[Show legend].
6. the legend disappears.
7. Check [Elements]-[Titles]-[Title].
8. Title with the text "Title" appears
9. Uncheck [Elements]-[Titles]-[Title]. 

Actual Results:
Title still remains.

Expected Results:
Title disappears.


Reproducible: Always


User Profile Reset: No



Additional Info:
maybe we need something similar to VLegend::isVisible thingy for VTitle?

https://opengrok.libreoffice.org/xref/core/chart2/source/view/main/ChartView.cxx?r=02c4b116#2251

https://opengrok.libreoffice.org/xref/core/chart2/source/view/main/ChartView.cxx?r=02c4b116#2107
---
note: lcl_createTitle and lcl_createLegend are called only from create2D variants. 
https://opengrok.libreoffice.org/s?refs=lcl_createTitle&project=core

note: for Titles, "Visible" property is set, not "Show" property
https://opengrok.libreoffice.org/xref/core/chart2/source/controller/sidebar/ChartElementsPanel.cxx?r=e871c9cb#146

====================
Version: 7.1.0.0.alpha0+ (x64)
Build ID: 28f09062b2e9a3228ef5fe41312769ad566cc4b6
CPU threads: 4; OS: Windows 10.0 Build 18363; UI render: default; VCL: win
Locale: ja-JP (ja_JP); UI: en-US
Calc: CL