This fixes an outdated date handling method used by spreadsheet global filters. It helps ensure spreadsheet filters continue to interpret dates correctly after related platform changes, reducing the chance of incorrect filtered results.

Related to odoo/odoo#98194

The list view now displays the icon beside the 'Add custom field' option with the correct spacing. This restores the previous visual style and makes the interface look cleaner and more consistent.

This commit fixes the style of the icon placed
next to the 'Add custom field' text in the list
view. Before this commit, the icon was placed
directly next to the text. We want to space
it correctly to bring back the legacy style.

Before this commit: 
<img width="58" alt="image" src="https://user-images.githubusercontent.com/35101914/185056435-128a02c0-09d6-4418-9b21-4e01b3bcb79c.png">

After this commit: 
<img width="52" alt="image" src="https://user-images.githubusercontent.com/35101914/185056480-b66b204c-385a-4a84-a92c-11ba186d58f6.png">

Legacy style: 
<img width="66" alt="image" src="https://user-images.githubusercontent.com/35101914/185056534-395f2e06-3f36-4698-8e2c-328ad54dafb5.png">

This change reverses a previous attempted fix for a Documents Spreadsheet test because it did not work as intended. It helps keep the codebase aligned with reliable behavior while the team determines a better solution.

…n spreadsheet"

This reverts commit 9a2f7a07581b6f76dac07b2cbf4c02987fa729f4 as the fix
does not work as intended.

This fix restores styling rules in Odoo Studio's form editor after recent form view changes caused some legacy editor styles to stop applying. It helps keep the form editing experience visually consistent and avoids layout or display issues for users customizing forms.