Improve support for pages without sections (titles)

[cglacet]

Is your feature request related to a problem? Please describe.
Pages that don't have any section seems to be hard to work with. Also, their HTML <title> looks odd (in the browser tabs for example). Currently, a page that doesn't have any section (with for example html_title set to 'test') will render <no title> — test.

Also it seems like the document can't be included in any toctree, even explicitly (using Title <test_doc>).

Describe the solution you'd like

• Ability to remove the <no title> — part so my page title is equal to html_title (for example in conf.py).
• Allow to explicitly reference documents that have no sections in a toctree.

Describe alternatives you've considered
I've tried patching it manually, without great success.

[tk0miya]

-1: Sphinx expects all documents have their title. It's very difficult to support it. I can accept if somebody implemented it simply. How about using include directive instead?

[cglacet]

I guess that would be ok if there was a way to hide/rename titles. In my case the problem is that I want to have a page that doesn't show any title at all. I can imagine it would be a problem for anyone with a long H1 title (which would look ugly/non-informative in the web browser tabs). In that second case hiding a title or defining a <title> independently of the first reST title (<h1>) would be nice too.

Similarly when you add a link using :doc: having two distinct titles would also make sense.

[tk0miya]

I marked this as "help wanted" to wait for a pull request for this. I'm welcome it :-)

[geographika]

A workaround for HTML pages is to add the title but hide it as follows:

.. raw:: html

   <div style="visibility: hidden;">

My Title
========

.. raw:: html

   </div>