[FIX] web_editor, website, *: improve post install theme and start tour

Before this commit, once you install website_* module, the ir.actions.todo from
the installed module was overidded by the 'choose a theme' action.

Now, when we consume this ir_act_todo, we re-open the open_menu that contains
most of the time the expected next action from new module installed.

Since we can also install module from the '+ new' button, in frontend, we
considere that it first step of tour is to click on it, it is already done and
we skip it.

Install website_event
Before:
   -> not redirected to /event (the ir.action.todo)
   -> no tour, if you don't click manually on '+ new'

After:
    -> you are redirected to /event
    -> you can launch tour from '+ new' if you are already on the new panel,
       start direclty to the second step 'create event'

1 files changed, 5 insertions, 1 deletions

diff --git a/addons/website/models/ir_module_module.py b/addons/website/models/ir_module_module.py
index ff843663161..9ec53dcc519 100644
--- a/addons/website/models/ir_module_module.py
+++ b/addons/website/models/ir_module_module.py
@@ -360,7 +360,11 @@ class IrModuleModule(models.Model):
         # this will install 'self' if it is not installed yet
         self._theme_upgrade_upstream()
 
-        return website.button_go_website(mode_edit=True)
+        active_todo = self.env['ir.actions.todo'].search([('state', '=', 'open')], limit=1)
+        if active_todo:
+            return active_todo.action_launch()
+        else:
+            return website.button_go_website(mode_edit=True)
 
     def button_remove_theme(self):
         """Remove the current theme of the current website."""