feat: scroll to selected item in ion-select

[kensodemann]

Feature Request

Ionic version:
[x] 5.x

Describe the Feature Request
When you have a reasonably long list of items that are being displayed in an ion-select, it would be helpful if the list would scroll such that the currently selected item is in view.

With recent changes, this is less of a problem on desktop as the Tab key will do this when you tab in to the select, but on mobile it is a bit clumsy currently to scroll down to the currently selected item.

Describe Preferred Solution
See this demo: https://github.com/kensodemann/demo-select

It has one select that uses the default alert interface and the other using the popover interface.

For both of them, select an item that you would need to scroll down to. Upon next opening that same select, it will start at the top rather than scrolling to the selected item.

[kensodemann]

For reference, Angular MD's select will scroll to the selected item if there are several in the list: https://material.angular.io/components/select/overview (see the state picker a bit down the screen)

[liamdebeasi]

Thanks for the issue. I am going to close this as a duplicate of #19296.

[ionitron-bot]

Thanks for the issue! This issue is being locked to prevent comments that are not relevant to the original issue. If this is still an issue with the latest version of Ionic, please create a new issue and ensure the template is fully filled out.