[FIX] web_editor: highlight selected fa icon on media dialog start
[FIX] web_editor: highlight selected fa icon on media dialog start

When editing a fa icon in the editor, the current fa icon was not
properly selected anymore.

Note: the code is still to be improved to handle all cases but this
will be done in master.

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo