Adds support for Chilean exempt electronic boletas, allowing businesses to issue and report these tax documents through Odoo. This helps companies comply with Chilean electronic invoicing requirements for exempt sales without manual workarounds.

X-original-commit: ae2f62e1ef2299c8bfb739519e55974bd81abfe1

This update improves project planning by making task date changes in Gantt views behave more safely across dependent work, while preventing moves into the past or changes to completed tasks. It also fixes field service task completion, hides invoicing options until relevant customer details are set, and cleans up several Gantt view display issues.

The Sign request screen now keeps the signer selection area visible on mobile and medium-sized windows. This prevents users from getting blocked when sending signature requests from smaller screens and improves the layout across common window sizes.

* show the field in mobile and median sized window
* show correct style when the window size is extra small, medium and large

before this task:
the signer selection region of sign.send.request is hidden when the window size is medium or smaller
as a result, the user cannot send sign.requests

taskid: 2628872