This commit fixes some bugs on thread windows, and make some
improvements on tests related to thread windows.
Fixes:
1. Correctly position last visible thread window when there are more
open thread windows than available slots.
2. Closing a thread window now marks it as read.
3. Can now fold/unfold the blank thread window (aka 'New' thread window).
Tests cleaning:
1. Removed unnecessary 'before assertions' in thread window tests.
> Solved with this: https://github.com/odoo/odoo/commit/9b1daa1218f7adf9d741afba607ef5b55b16e3e6
1. Added basic rendering test for a (non-blank) thread window.
2. Cleaned thread window tests
> Split in different files.
> Grouped in 'Thread Window' QUnit module.
Alexandre Kühn
eee49f13f0