Preparation time settings for Urban Piper point of sale integrations are now shown in minutes instead of seconds. This makes the timing easier for restaurant staff and managers to understand and configure accurately.

**pos_urban_piper_enhancements
Following this commit:
- Preparation time would be displayed in minutes instead of seconds.

Related PR - https://github.com/odoo/upgrade/pull/7412

task-4581925

This update removes a duplicate internal way of scheduling activities in Belgian reports and uses the existing standard process instead. It helps keep the module simpler and reduces the chance of inconsistent behavior, with no expected change for everyday users.

Due to an oversight, we added an unnecessary activity scheduling method in d684d074af82fbd0fac6b3a1c56b4e01a17dd74a. 
This should be replaced by the already existing `activity_schedule` method in `account.move`.

No task ID.

Payslip reports now show clearer section headings for items such as taxes, pre-deductions, and post-deductions. This makes payslips easier for employees and payroll teams to read, while avoiding unnecessary validation of heading-only lines.

This PR improves the salary rules in the payslip report by adding bold and underlined titles for different groups such as taxes, pre-deductions, and post-deductions.

task-4615212

The Documents upload menu now has cleaner spacing between icons and text. This small visual adjustment makes the menu easier to scan and gives the interface a more polished, consistent appearance.

**before:**
![before](https://github.com/user-attachments/assets/bb4e9ba2-1845-4626-8e1a-c88b5f69e446)


**after:** 
![after](https://github.com/user-attachments/assets/c43634ce-e5b3-4ecb-9ebd-0f34b1cfabe8)