Known issues for the "about" notice

Summary

The "about" notice in the application should contain information on known issues prior to a release of the package.

These known issues also need to be part of the generated documentation.

Relevant issue(s) fixed

Fixes #252 (closed)

doc/known_issues.rst

@@ -40,7 +40,8 @@ Experiment editor
     - No preview of the toolchain currently available.
       (`Link to issue <https://gitlab.idiap.ch/beat/beat.editor/issues/185>`_)
     - Smart mapping/filtering to enable smarter algorithm selection based on matching
-      input and outputs.
+      input and outputs is not available yet. However the algorithms provided
+      are matching the inputs and outputs in terms of its numbers.
       (`Link to issue <https://gitlab.idiap.ch/beat/beat.editor/issues/185>`_)