Baseweb: [DatePicker] date select on right calendar shifts to left

[chasestarr]

example reproduction: https://codesandbox.io/s/cg7bt?module=/example.js

Current Behavior

1. select a date in the right calendar
2. notice that the previously right calendar is now on the left

Expected Behavior

1. select a date in the right calendar
2. calendars should not change position

Your Environment

| Tech | Version |
| ------- | ------- |
| Base UI | v9.29.0 |

• [x] I have searched the issues of this repository and believe that this is not a duplicate.

[benmkramer]

Thanks Chase. I agree this might not be a big deal and users might generally select the start date first, so advancing the calendar gives them more range automatically. However, if there are users or use-cases that might lean towards picking an end date first, then it could be nice to configure this auto-advancement.

[chasestarr]

I'm going to mark this issue as an enhancement to provide the ability to configure this behavior since we now want the position shifting to be default behavior.

[foodforarabbit]

will submit PR for this soon