Add configurable scroll-to-top behavior to dcc.Link

[CNFeffery]

This PR makes the automatic scroll-to-top behavior of dcc.Link configurable.

• Add a new boolean scrollToTop prop that defaults to true, preserving the existing behavior.
• Only call window.scrollTo(0, 0) when scrollToTop is enabled.

Closes #3974

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[AnnMarieW]

Nice PR!
Just chiming in here...

What do you think about naming the prop scrollTo (or scroll_to) and allowing the arguments supported by Element.scrollTo ?

It could default to the current behavior, scrollTo(0, 0), and also allow the options dict with top, left, and behavior.

[CNFeffery]

Nice PR! Just chiming in here...

What do you think about naming the prop scrollTo (or scroll_to) and allowing the arguments supported by Element.scrollTo ?

It could default to the current behavior, scrollTo(0, 0), and also allow the options dict with top, left, and behavior.

Since for the dcc.Link component, its built‑in behavior policy only has two states: whether to automatically scroll back to the top. Introducing more complex scroll‑position parameter controls does not seem necessary at this stage.