[REF] web,*: ActionManager/ViewManager refactoring

This rev. is the first part (out of 3) of the refactoring of the
ActionManager and ViewManager layer of the webclient.

The main changes are:
  - there is no ViewManager anymore, its work is now handled by the
    ActionManager itself, but isolated in a specific file ; this
    eases a lot of things, as the breadcrumbs handling for example.
  - the ActionManager code is converted to the new coding principles
    and guidelines ; mainly, children widgets communicate with it by
    triggering events up, and not by function calls anymore.
  - the ActionManager layer is now testable, and a lot of tests have
    already been written.
  - the code in other addons has been adapted consequently.

What's coming next:
  - introduce the 'AbstractAction' Widget, and make client actions
    and view controllers inherit from it ; this widget will
    implement a common API that could be used uniformly by the
    ActionManager (e.g. restore(), canBeLeft(), renderButtons(),
    getTitle()...).
  - move the ControlPanel handling from the ActionManager to the
    AbstractAction.

1 files changed, 0 insertions, 11 deletions

diff --git a/addons/web/static/src/js/core/misc.js b/addons/web/static/src/js/core/misc.js
index 99c21c14038..be0f012752c 100644
--- a/addons/web/static/src/js/core/misc.js
+++ b/addons/web/static/src/js/core/misc.js
@@ -140,17 +140,6 @@ function Home (parent, action) {
 }
 core.action_registry.add("home", Home);
 
-/**
- * Client action to go back in breadcrumb history.
- * If can't go back in history stack, will go back to home.
- */
-function HistoryBack (parent) {
-    parent.history_back().fail(function () {
-        Home(parent);
-    });
-}
-core.action_registry.add("history_back", HistoryBack);
-
 function login() {
     redirect('/web/login');
 }