This fix prevents the Mail app from crashing when a user edits a message while the file uploader is involved. It improves reliability in conversations and helps users continue editing messages without interruption.

task-2726182

This update makes an internal calendar test more reliable by ensuring the test scrolls to the calendar event before clicking it. This helps prevent false test failures and supports smoother ongoing development without changing the user-facing calendar experience.

This commit fixes the calendar test "select events and discard create"
which was crashing certainly because the event we want to click on was
out of the screen at this moment.
Calendar tests use positional mouse[down|up] events to simulate clicks
on events so we need first to scroll to the wanted event before clicking
on it.