[IMP] Web et al.: ControlPanel extracted from ViewManager

The ControlPanel is still instantiated by the ViewManager.

Changes details:
* web: views.js:
    Code related to views header is extracted from the ViewManager
    to a new Widget named ControlPanel.

    Also uses the headless flag to tell the inner view not to put
    its buttons (use case: kanban) or pager (use case: list) in the
    header as it is hidden.
* web: view_form.js, base.xml:
    Uses the headless flag at initialization of the One2ManyViewManager
    widget instead of extending the ViewManager template (which doesn't
    handle the header anymore).

* web: view_list.js:
    Test on this.options.$pager instead of this.options.$buttons
    when dealing with pager.

    Note: the behavior for list view is unchanged and has a bug.
    If there are more then 80 records to display, only the 80th
    first are display, and as there is no pager, there is no way
    to see the remaining ones. A fix for this would be to use a
    light ControlPanel in One2Many views as well. With this,
    there won't be duplicated .oe-'view'-buttons/sidebar/pager
    anymore.

* web: view_graph.js, view_pivot.js:
    Only render buttons in non-headless mode

* web_dashboard: dashboard.js:
    Fix some references that were broken with ControlPanel extraction

* web_view_editor: web_view_editor.js:
    Extend ControlPanel instead of ViewManager

* Changes in selector of ControlPanel elements in several addons:
    * base_import
    * mail
    * web

1 files changed, 9 insertions, 6 deletions

diff --git a/addons/web/static/src/js/views/graph_view.js b/addons/web/static/src/js/views/graph_view.js
index f8e89a27e86..2ab42516ba2 100644
--- a/addons/web/static/src/js/views/graph_view.js
+++ b/addons/web/static/src/js/views/graph_view.js
@@ -34,12 +34,15 @@ var GraphView = View.extend({
         return $.when(this._super(), load_fields).then(this.render_buttons.bind(this));
     },
     render_buttons: function () {
-        var context = {measures: _.pairs(_.omit(this.measures, '__count__'))};
-        this.$buttons.html(QWeb.render('GraphView.buttons', context));
-        this.$measure_list = this.$buttons.find('.oe-measure-list');
-        this.update_measure();
-        this.$buttons.find('button').tooltip();
-        this.$buttons.click(this.on_button_click.bind(this));
+        // Render buttons only in non-headless mode as buttons are in the header
+        if (!this.options.headless) {
+            var context = {measures: _.pairs(_.omit(this.measures, '__count__'))};
+            this.$buttons.html(QWeb.render('GraphView.buttons', context));
+            this.$measure_list = this.$buttons.find('.oe-measure-list');
+            this.update_measure();
+            this.$buttons.find('button').tooltip();
+            this.$buttons.click(this.on_button_click.bind(this));
+        }
     },
     update_measure: function () {
         var self = this;