[FIX] project: only internal users in "Assigned To" field of task form

Values filled in "Assigned To" m2o were differing:
- if I "CREATE" task with "group by" then m2o is filled with
internal-users + portal-users
- if I "CREATE: task without group by then it filled with internal
users only.

In Project also same case.

To have a more coherent behaviour, we decided to put only internal
users in both cases.

Task ID #2229592
Community PR #54776

closes odoo/odoo#55820

X-original-commit: 8269c1958843002246c589cdd593417dec44f024
Related: odoo/enterprise#12376
Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>

addons/portal/static/src/js/portal_signature.js

@@ -162,6 +162,7 @@ publicWidget.registry.SignatureForm = publicWidget.Widget.extend({
             mode: this.$el.data('mode'),
             displaySignatureRatio: this.$el.data('signature-ratio'),
             signatureType: this.$el.data('signature-type'),
+            fontColor: this.$el.data('font-color')  || 'black',
         };
         var sendLabel = this.$el.data('send-label');
 

addons/portal/views/portal_templates.xml

@@ -483,6 +483,7 @@
             t-att-data-send-label="send_label"
             t-att-data-signature-ratio="signature_ratio"
             t-att-data-signature-type="signature_type"
+            t-att-data-font-color="font_color"
             />
     </template>
 

addons/project/views/project_views.xml

@@ -804,7 +804,7 @@
                 <form>
                     <group>
                         <field name="name" string = "Task Title"/>
-                        <field name="user_id" options="{'no_open': True,'no_create': True}"/>
+                        <field name="user_id" options="{'no_open': True,'no_create': True}" domain="[('share', '=', False)]"/>
                         <field name="project_id" required="1" invisible="context.get('all_task', 1)"/>
                         <field name="company_id" invisible="1"/>
                         <field name="parent_id" invisible="1"/>