fix(Autocomplete): dont put text cursor to the end on every change event

[Chaoste]

Purpose of PR

See this comment. Downshift will always move the text cursor to the end of the input. Following the linked comment, we handle the change manually and thereby avoid the rerender (and cursor position change).

Before:

Screen.Recording.2022-03-22.at.17.56.45.mov

After:

Screen.Recording.2022-03-22.at.17.57.29.mov

I wrote a test but it always worked. The jumping cursor bug doesn't appear in the jsdom context.

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• Tests are added/updated/not required
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• Has been tested based on Contentful's browser support
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[burakukula]

Great improvement! Thanks a lot! 🙌