[FIX] *: wrong `color_field` attribute for m2m_tags

This fix previous commit a29f7f671b.

(1) Some objects have no color field.
(2) There was an issue when two many2many tags were instantiated:
    If the first one had the 'color_field' attribute the second one
    had it too even if this attribute weren't specified.
    Now, it's fixed in data_manager

1 files changed, 1 insertions, 1 deletions

diff --git a/addons/web/static/src/js/services/data_manager.js b/addons/web/static/src/js/services/data_manager.js
index c1e69a72ce3..999a9d8df01 100644
--- a/addons/web/static/src/js/services/data_manager.js
+++ b/addons/web/static/src/js/services/data_manager.js
@@ -349,7 +349,7 @@ return core.Class.extend({
             }
             if (attrs.Widget.prototype.fieldsToFetch) {
                 attrs.viewType = 'default';
-                attrs.relatedFields = attrs.Widget.prototype.fieldsToFetch;
+                attrs.relatedFields = _.extend({}, attrs.Widget.prototype.fieldsToFetch);
                 attrs.fieldsInfo = {
                     default: _.mapObject(attrs.Widget.prototype.fieldsToFetch, function () {
                         return {};