mail_optional_follower_notification

Purpose

Lets users decide whether messages composed on records should notify followers instead of always notifying them automatically.

Features

res.company: Stores the company-level default preference for notifying followers when composing emails.
res.config.settings: Lets administrators configure the default notify followers option from general settings.
mail.compose.message: Adds a notify followers checkbox that defaults from the company setting and passes the choice when sending.
mail.compose.message: Hides the follower recipient list and shows a warning when follower notifications are disabled for a message.
mail.thread: Filters out follower recipients when the context disables follower notifications so only explicitly addressed partners are emailed.