[FIX] web: oe_title + oe_avatar alignment in Form view

This commit fixes a broken selector when an avatar image (`.oe_avatar`)
is used next to a title element (`.oe_title`) to put them side-by-side.

Also it goes beyond that by ensuring the `.oe_title` element doesn't
take the whole width (cf. max 75%) to make a visual distinction between
it and the other form's fields, both in editable and non-editable form.

In small screen, as space is limited, the whole width is kept to make it
more userfriendly, only allowing a thin gap between the `.oe_title` and
the `.oe_avatar`.

Steps to reproduce:
- Open Apps
- Choose an App and, in the dropdown, click on Module Info
=> there is a huge gap at the top of the title

closes odoo/odoo#110431

Signed-off-by: Adrien Dieudonné (adr) <adr@odoo.com>