When delete backward/forward OR deleteRange,
we need to ensure the break lines stay consistent with the user action.
Some cases where not handled correctly.
Mainly when a <p> tags was removed and not directly adjacent to another block element.
In those case we kept too much or too little break lines.
@see tests added in `test/spec/editor.test.js`
task-2604627
X-original-commit: 9f14422ffceadd48b76ff460e4080e0cf5bc6fa2
Part-of: odoo/odoo#89210
Sébastien Geelen (sge)
fcc035bcaa