[IMP] base: UX improvement of Load Languages

The activation of languages was changed at bd3a553ad9
This commit makes a few changes/fixes

- When executing the toggle_active method do not open the wizard but load
directly the language

- Rename the name of the button in tree view, Download was confusing as implies
the resources are downloaded while it is only loaded
- Remove duplicated help

- Add action button to load the language from the form view (as it the only way
from the form view was using the "Unarchive" action)

- Add label directly next to the field (was making a line return)
- Set the placeholder on the field (no effect on the label)
- Remove groups as the view is already restricted to system users

Follow-up of task id 2026150

closes odoo/odoo#34940

Signed-off-by: Martin Trigaux (mat) <mat@odoo.com>

odoo/addons/base/models/res_lang.py

@@ -215,16 +215,10 @@ class Lang(models.Model):
     def toggle_active(self):
         super().toggle_active()
         # Automatically load translation
-        if len(self) == 1 and self.active:
-            return {
-                'name': "Load a Translation",
-                'type': 'ir.actions.act_window',
-                'res_model': 'base.language.install',
-                'context': {'default_lang': self.code},
-                'view_mode': 'form',
-                'target': 'new',
-                'views': [[False, 'form']],
-            }
+        active_lang = [lang.code for lang in self.filtered(lambda l: l.active)]
+        if active_lang:
+            mods = self.env['ir.module.module'].search([('state', '=', 'installed')])
+            mods._update_translations(filter_lang=active_lang)
 
     @api.model_create_multi
     def create(self, vals_list):

odoo/addons/base/views/res_lang_views.xml

@@ -13,7 +13,9 @@
                     <field name="translatable" groups="base.group_no_one"/>
                     <field name="active"/>
                     <button name="%(base.action_view_base_language_install)d"
-                    string="Download and Update Translation" type="action" icon="fa-refresh" help="Download and Update Translation"/>
+                        string="Activate Language and Update Translations"
+                        type="action"
+                        icon="fa-refresh"/>
                 </tree>
             </field>
         </record>
@@ -23,6 +25,13 @@
             <field name="arch" type="xml">
                 <form string="Languages">
                     <sheet>
+                        <div class="oe_button_box" name="button_box">
+                            <button string="Activate and Translate"
+                                name="%(base.action_view_base_language_install)d"
+                                type="action"
+                                class="oe_stat_button"
+                                icon="fa-refresh" />
+                        </div>
                         <div class="oe_title">
                             <label for="name" class="oe_edit_only"/>
                             <h1><field name="name"/></h1>

odoo/addons/base/views/res_users_views.xml

@@ -213,18 +213,16 @@
                             <page string="Preferences">
                                 <group>
                                     <group string="Localization" name="preferences">
-                                        <label for="lang" placeholder="System (English)"/>
                                         <field name="active" invisible="1"/>
+                                        <label for="lang" />
                                         <div class="o_row">
-                                            <field name="lang"/>
+                                            <field name="lang" placeholder="System (English)"/>
                                             <button
                                                 type="action"
                                                 name="%(base.res_lang_act_window)d"
                                                 class="btn-sm btn-link mb4 fa fa-globe"
                                                 aria-label="More languages"
-                                                groups="base.group_system"
-                                                title="More languages"
-                                            />
+                                                title="More languages"/>
                                         </div>
                                         <field name="tz" widget="timezone_mismatch" options="{'tz_offset_field': 'tz_offset'}" />
                                         <field name="tz_offset" invisible="1"/>