Bruno Leroux 7e9ba43698
Fix DropdownButtonFormField padding when ButtonTheme.alignedDropdown is true (#162810)
## Description

This PR fixes `DropdownButtonFormField` content padding when
`ButtonTheme.alignedDropdown` is true.

### Before:

An extra padding is added before the content when `alignedDropdown` is
true:


![image](https://github.com/user-attachments/assets/429aa848-c56a-4e74-aca3-6c9eb9507578)


### After:

The content has the same position whether `alignedDropdown` is true or
false:


![image](https://github.com/user-attachments/assets/2476194d-b582-4991-9285-d5c94af86f6a)


## Related Issue

Fixes https://github.com/flutter/flutter/issues/123783

## Tests

Adds 1 test.
2025-02-13 00:38:19 +00:00
..
2025-02-11 23:47:59 +00:00