[FIX] website: make address selection in editor more robust

Using the "gps picker" (for example with the "Google Map" snippet) was
not flawless. The autocomplete menu which shows up when the user enters
an address is handled by the gmap API. It was actually not working at
all on Firefox for an unknown reason. Not listening to blur events on
the input seems to solve the issue. This commit also prevents triggering
a value change if the same address is reselected which seems to make
address changes a bit more robust too.

opw-2976261

closes odoo/odoo#105072

Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>