Before this commit, when the user wants to self assign to a task for
instance, he has to write his name to be able to select himself.
This commit displays the current user first in the result of
`name_search` (the method called by relational widgets in JS).
If the current user does not satisfy the search condition then
he will not be in the result of the `name_search`.
task-3291745
closesodoo/odoo#121146
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>
