*odoo_referral,portal

Currently, it is not possible to have one line notification,
when you are not passing the title parameter as an option when
generating the notification,then it will display the blank div
with the default button icon only. so it is not possible to have
one-line notifications since the title is mandatory.

So the purpose of the task is to make the title optional, allowing
for more minimalistic notification.

Also removed some unnecessary titles from the notification and
some stying change.

This commit also increase the autoclose delay of non sticky
notifications, from 2.5s to 4s.

task : 2264749

closes odoo/odoo#52229

Related: odoo/enterprise#10981
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
Co-authored-by: Dhruv Patel <dhp@odoo.com>

* web, theme_bootswatch

Improvement of https://github.com/odoo/odoo/commit/02a321cffb2da60a86b960e75c445e37094567b4

- Clarify the name of the support font (to distinguish it from standard
  and google fonts and avoid confusion with Noto Sans and Noto Serif).

- Make sure the support font is added and can be added for all font
  definitions in odoo scss files thanks to a scss function.

Could be backported in 12.0 if judged necessary.

Part of https://github.com/odoo/odoo/pull/37293

The basic font-family offered on Odoo do not support a large set of characters
and rely on the system fonts for non-latin languages
On a system without specific fonts installed, the characters were replaced by �
For Hebrew, the system sans-serif font (at least on Windows pc) was too small.

Rely on the unicode-range range CSS descriptor to load a font only for a
specific range of unicode code.
https://developer.mozilla.org/en-US/docs/Web/CSS/%40font-face/unicode-range
This way, the fonts are ignored for English text (and you don't have to load
the fonts of every possible language).

Add Noto fonts that covers many charsets.
There is an heavy version for many charset and lighter ones for Arabic and Hebrew
More ranges can be added later

Serve the fonts on our CDN to avoid shipping several MB of fonts for everyone
but lazyload it when needed.

Fixes odoo/odoo#32228
Fixes odoo/odoo#21781

if you have some style e.g. on btn, and use class="fa fa-bug btn btn-sm" the
icon will be rendered with font-family style of btn

Some features are common to portal and backend, such as the sign modal in
enterprise.

This commit uniformize the width of the modal to make it more consistent between
the two by default. Of course themes can still customize this behavior.

closes odoo/odoo#29521

closes odoo/odoo#30614