In the context of an action, one can specify the "dialog_size" key (only useful for actions in target="new"), which impacts the size of the dialog. Before this commit, the corresponding bootstrap classname wasn't applied. As a result, the dialog size was always "large". This commit fixes that issue. closes odoo/odoo#97085 Signed-off-by: Géry Debongnie <ged@odoo.com>