[18.0][FIX] readonly condition in analytic_distribution widget

Author: andrel-exo

account_analytic/views/account_move_views.xml

@@ -10,7 +10,7 @@
                     name="analytic_distribution"
                     widget="analytic_distribution"
                     groups="analytic.group_analytic_accounting"
-                    readonly="state in ('done', 'cancel')"
+                    readonly="state == 'cancel'"
                 />
             </xpath>
             <field name="line_ids" position="attributes">