[Lens] Ignores title when using on-the-fly popover

[nickofthyme]

When using Lens on-the-fly popover, it can sometimes override/ignore the title property.

The offending code is line 233 below, that overrides the title to a presumptive default value of visualization.activeId.

https://github.com/elastic/kibana/blob/64a4c6dfaa3d174ffc2ab7120fbdf8bb0c372b2b/x-pack/plugins/lens/public/app_plugin/shared/edit_on_the_fly/lens_configuration_flyout.tsx#L224-L234

Steps to reproduce

• Install any sample dataset
• Create a new dashboard
• Add 4 visualization using the Create visualization button then afterward Save to library to give a name to your visualization.
• On the last visualization, click Edit visualization and change visualization type from Bar vertical stacked to Area, then click Apply and close. The name is not changed.
• Repeat the same step above, changing this time from Area to Bar vertical stacked.

Now the name is changed to InsXY:

[elasticmachine]

Pinging @elastic/kibana-visualizations (Team:Visualizations)

[markov00]

This is actually way worse than it seems. It overrides the visualization title in the Visualization Library on every inline-edited visualization...

https://github.com/elastic/kibana/assets/1421091/3dc8924f-24f8-4ef6-b816-07fad6557031