[IMP] web,*: config: add XXS size to config.device

In Less, the size_class XXS is defined and used in media queries.
This rev. adds it in JS for sake of consistency.

Code in addons comparing the size_class needed to be adapted due
to the new XXS size_class.

Moreover, we now use the helper 'config.device.isMobile' everywhere
we should, instead of manually comparing the size_class.

Finally, we changed the way the config.device has to be specified
in the test environment. From now on, only the size_class should be
set, and the isMobile flag is computed automatically.

addons/web/static/tests/fields/basic_fields_tests.js

@@ -3,6 +3,7 @@ odoo.define('web.basic_fields_tests', function (require) {
 
 var basicFields = require('web.basic_fields');
 var concurrency = require('web.concurrency');
+var config = require('web.config');
 var core = require('web.core');
 var FormView = require('web.FormView');
 var KanbanView = require('web.KanbanView');
@@ -2987,9 +2988,8 @@ QUnit.module('basic_fields', {
             res_id: 1,
             config: {
                 device: {
-                    size_class: 0, // Screen XS
-                    SIZES: { XS: 0, SM: 1, MD: 2, LG: 3 },
-                }
+                    size_class: config.device.SIZES.XS,
+                },
             },
         });
 
@@ -3032,9 +3032,8 @@ QUnit.module('basic_fields', {
             arch: '<tree editable="bottom"><field name="foo"  widget="phone"/></tree>',
             config: {
                 device: {
-                    size_class: 0, // Screen XS
-                    SIZES: { XS: 0, SM: 1, MD: 2, LG: 3 },
-                }
+                    size_class: config.device.SIZES.XS,
+                },
             },
         });
 
@@ -3097,9 +3096,8 @@ QUnit.module('basic_fields', {
             res_id: 1,
             config: {
                 device: {
-                    size_class: 1, // Screen SM
-                    SIZES: { XS: 0, SM: 1, MD: 2, LG: 3 },
-                }
+                    size_class: config.device.SIZES.SM,
+                },
             },
         });
 
@@ -3145,9 +3143,8 @@ QUnit.module('basic_fields', {
             arch: '<tree editable="bottom"><field name="foo"  widget="phone"/></tree>',
             config: {
                 device: {
-                    size_class: 1, // Screen SM
-                    SIZES: { XS: 0, SM: 1, MD: 2, LG: 3 },
-                }
+                    size_class: config.device.SIZES.SM,
+                },
             },
         });
 
@@ -3199,9 +3196,8 @@ QUnit.module('basic_fields', {
             },
             config: {
                 device: {
-                    size_class: 0,
-                    SIZES: { XS: 0, SM: 1, MD: 2, LG: 3 },
-                }
+                    size_class: config.device.SIZES.XS,
+                },
             },
         });