[FIX] base: avoid confusion between synchronize and update terms

The action "Load a Translation" is wrongfully considered as only for
installation of a new language (while it is for update too).

The action "Synchronize Terms" is wrongfully considered as to refresh
translations of installed language (while it is to generate empty translations).
Rename to "Generate Missing Terms"

The res.lang tree view encourage this misconception with a "update terms" that
actually triggers a synchronize terms action.
Change the triggered action to the "Load & Update"

Move the list of languages to always visible in settings.
This list is not very technical and will avoid to go to debug mode for basic
actions like updating the sources of checking what languages are installed.
Going less often to dev mode will hide the misleading "Synchronize Terms" action
for normal users.

Closes #19911

odoo/addons/base/module/wizard/base_language_install.py

@@ -8,11 +8,22 @@ class BaseLanguageInstall(models.TransientModel):
     _name = "base.language.install"
     _description = "Install Language"
 
+    @api.model
+    def _default_language(self):
+        """ Display the selected language when using the 'Update Terms' action
+            from the language list view
+        """
+        if self._context.get('active_model') == 'res.lang':
+            lang = self.env['res.lang'].browse(self._context.get('active_id'))
+            return lang.code
+        return False
+
     @api.model
     def _get_languages(self):
         return self.env['res.lang'].get_available()
 
-    lang = fields.Selection(_get_languages, string='Language', required=True)
+    lang = fields.Selection(_get_languages, string='Language', required=True,
+                            default=_default_language)
     overwrite = fields.Boolean('Overwrite Existing Terms',
                                help="If you check this box, your customized translations will be overwritten and replaced by the official ones.")
     state = fields.Selection([('init', 'init'), ('done', 'done')],

odoo/addons/base/module/wizard/base_update_translations.py

@@ -16,15 +16,8 @@ class BaseUpdateTranslations(models.TransientModel):
         langs = self.env['res.lang'].search([('active', '=', True), ('translatable', '=', True)])
         return [(lang.code, lang.name) for lang in langs]
 
-    @api.model
-    def _default_language(self):
-        if self._context.get('active_model') == 'res.lang':
-            lang = self.env['res.lang'].browse(self._context.get('active_id'))
-            return lang.code
-        return False
 
-    lang = fields.Selection(_get_languages, 'Language', required=True,
-                            default=_default_language)
+    lang = fields.Selection(_get_languages, 'Language', required=True)
 
     @api.model
     def _get_lang_name(self, lang_code):

odoo/addons/base/module/wizard/base_update_translations_view.xml

@@ -2,11 +2,11 @@
 <odoo>
     <data>
          <record id="wizard_update_translations" model="ir.ui.view">
-            <field name="name">Synchronize Terms</field>
+            <field name="name">Generate Missing Terms</field>
             <field name="model">base.update.translations</field>
             <field name="arch" type="xml">
-                <form string="Synchronize Terms">
-                    <group string="Synchronize Translation">
+                <form string="Generate Missing Terms">
+                    <group string="Generate Missing Terms">
                         <field name="lang"/>
                     </group>
                     <footer>
@@ -17,7 +17,7 @@
             </field>
         </record>
         <record id="action_wizard_update_translations" model="ir.actions.act_window">
-            <field name="name">Synchronize Terms</field>
+            <field name="name">Generate Missing Terms</field>
             <field name="type">ir.actions.act_window</field>
             <field name="res_model">base.update.translations</field>
             <field name="view_type">form</field>

odoo/addons/base/res/res_lang_view.xml

@@ -12,7 +12,7 @@
                     <field name="direction"/>
                     <field name="translatable"/>
                     <field name="active"/>
-                    <button name="%(base.action_wizard_update_translations)d"
+                    <button name="%(base.action_view_base_language_install)d"
                     string="Update Terms" type="action" icon="fa-refresh" help="Update Language Terms"
                     attrs="{'invisible': [('active', '=', False)]}"/>
                 </tree>
@@ -102,6 +102,6 @@
             <field name="context">{'active_test': False}</field>
             <field name="search_view_id" ref="res_lang_search"/>
         </record>
-        <menuitem action="res_lang_act_window" id="menu_res_lang_act_window" parent="menu_translation" groups="base.group_no_one" sequence="1"/>
+        <menuitem action="res_lang_act_window" id="menu_res_lang_act_window" parent="menu_translation" sequence="1"/>
     </data>
 </odoo>