When the selection was in a link, the alignment buttons didn't work.
That is because they are supposed to align the parent paragraph, which
is temporarily in a contenteditable=false context when the selection is
in a link. This restores the context before applying an editor command,
and restores it afterwards.
task-3083748
X-original-commit: 0a4eb266b198e5e02a3325d063d07c0dd8af0148
Part-of: odoo/odoo#107155
Antoine Guenet
c94c19cc3c