Move new extension creation wizard to python scripting

* We remove the operations and interactions from the extension manager and leave
  it purely for browsing extensions and enabling/disabling them.

docs/how/how_python_extension.rst

@@ -8,6 +8,9 @@ Example extensions can be found at the `community contributed repository <https:
 Creating extensions
 -------------------
 
+.. tip::
+    You can ask RenderDoc to create an empty extension for you from the :doc:`python scripting <../window/python_scripting>` window.
+
 Extensions are simply python modules located in the user's RenderDoc config folder, with a json manifest. The config folder varies by platform, on Windows it's ``%APPDATA%\qrenderdoc\extensions`` and on linux it's ``~/.local/share/qrenderdoc/extensions``. Each extension is a python module subfolder under this root. You can nest subfolders, e.g. ``extensions/foo/bar/first`` would be the extension ``foo.bar.first``, and treated independently from ``extensions/foo/bar/second``.
 
 Next to each python module's ``__init__.py`` you should create a file ``extension.json`` following this template:

docs/python_api/ui_extensions.rst

@@ -14,7 +14,9 @@ In any subdirectory under this path you can register an extension by creating a
 
 	Extension Manager: Configures installed extensions.
 
-To streamline setup we will ask RenderDoc to create a new extension for us. Open the extension manager by opening the :guilabel:`Tools` menu and select :guilabel:`Manage Extensions`, then click the :guilabel:`Create New...` button and enter a package name such as ``tutorialext``. This will create the ``extension.json`` and ``__init__.py`` files in a new folder ``tutorialext`` for us.
+To streamline setup we will ask RenderDoc to create a new extension for us. Open the python scripting window from :guilabel:`Window` → :guilabel:`Python Scripting`. Then either double click the :guilabel:`Create New...` item under the :guilabel:`UI Extensions` section, or right click on the section title and select the option from the context menu.
+
+From the dialog that appears enter a package name such as ``tutorialext``. This will create the ``extension.json`` and ``__init__.py`` files in a new folder ``tutorialext`` for us.
 
 For more information about the registration of python extensions see :doc:`../how/how_python_extension`