[FIX] crm: fix lead/opportunity meeting scheduling

Reproduce the issue:
 - In the CRM app, create a lead/opportunity.
 - Schedule a meeting for this opportunity via
   the chatter and click on create.
 - Go back, the "Meeting" stat button is now at 1
 - Schedule a meeting for this opportunity via
   the chatter and click on edit then create.
 - Go back, the "Meeting" stat button is still at 1

Cause:
When we click directly on create, the opportunity ID is in the defaults
option but when we click on edit, there is no opportunity ID.

So, this commit use the context to retrieve the concerned opportunity
and set it if it is not already set.

I splitted the solution into a private method for a better readability.

OPW-2092920

closes odoo/odoo#39964

X-original-commit: 59d154dcc1524c8f08c6a1e7aee18c722ab2e0ad
Signed-off-by: Jason Van Malder <jasonvanmalder@users.noreply.github.com>

0 files changed, 0 insertions, 0 deletions