fix animation error after dispose

[tomavelev]

Steps to reproduce

• Place the slider inside a Bottom sheet or Alert Dialog
• Move the value - so the tooltip appears
• dispose the parent container before the tooltip disappears

[Mugunthan-Ramalingam]

Hi @tomavelev,

We have checked the mentioned issue and tried to replicate it in SfSlider with version 29.2.11 by considering the following scenario,

1. Ensured the simple sample in web, windows and android platform.
2. Ensured the sample by placing the slider widget inside the alert dialog widget.
3. Ensured the sample by placing the slider widget inside the bottom sheet widget.

However, we were unable to reproduce it on our end. Please check the attached sample, and if you are still experiencing the issue, we request that you replicate it in the attached sample and provide us with more details regarding the specific scenario in which you are encountering this issue. This will help us to assist you more effectively.

Demo:

Sample: gh_2372.zip

Regards,
Mugunthan.