[FIX] web: prevent set value of priority if readonly

The priority widget did not handle the readonly concept
It was therefore possible to set the priority of
an issue (for instance) even if the field was marked
as readonly.

opw-628960

addons/web/static/src/js/view_form.js

@@ -2424,7 +2424,9 @@ instance.web.form.Priority = instance.web.form.FieldChar.extend({
         this.record_id = this.view.datarecord.id;
         this.priorities = this.prepare_priority();
         this.$el.html(QWeb.render("Priority", {'widget': this}));
-        this.$el.find('li').on('click', this.set_priority.bind(this));
+        if (!this.get('readonly')){
+            this.$el.find('li').on('click', this.set_priority.bind(this));
+        }
     },
     /* setting the value: in view mode, perform an asynchronous call and reload
     the form view; in edit mode, use set_value to save the new value that will

addons/web/static/src/xml/base.xml

@@ -1056,9 +1056,10 @@
     <ul style="list-style: none; padding-left: 2px; display: inline-block;">
         <t t-foreach="widget.priorities" t-as="rec" >
             <li t-att-data-value="rec.click_value" style="display: inline-block;">
-                <a href="#" t-att-title="rec.name">
+                <a t-if="!widget.get('readonly')" href="#" t-att-title="rec.name">
                     <span t-att-class="widget.get('value') gte rec.value and 'oe_e oe_star_on' or 'oe_e oe_star_off'">7</span>
                 </a>
+                <span t-if="widget.get('readonly')" t-att-title="rec.name" t-att-class="widget.get('value') gte rec.value and 'oe_e oe_star_on' or 'oe_e oe_star_off'">7</span>
             </li>
         </t>
     </ul>

addons/web_kanban/static/src/js/kanban.js

@@ -1300,8 +1300,14 @@ instance.web_kanban.Priority = instance.web_kanban.AbstractField.extend({
         var self = this;
         this.record_id = self.parent.id;
         this.priorities = self.prepare_priority();
+        var readonly = this.field && this.field.readonly;
+        if (readonly){
+            this.set('readonly', true);
+        }
         this.$el = $(QWeb.render("Priority", {'widget': this}));
-        this.$el.find('li').click(self.do_action.bind(self));
+        if (!readonly){
+            this.$el.find('li').click(self.do_action.bind(self));
+        }
     },
     do_action: function(e) {
         var self = this;