In its previous implementation, the macro ``checkbox_onoff_reversed`` always
created an ``aria-labelledby`` attribute, even if there was no descriptive tag
with the generated ID (used as the value of the ``aria-labelledby``).
Before this patch, the Nu-HTML-Checker [1] reported 255 issues of this type::
The aria-labelledby attribute must point to an element in the same document. (255)
[1] https://validator.w3.org/nu/
Signed-off-by: Markus <markus@venom.fritz.box>
HINT: this patch has no functional change / it is the preparation for following
changes and bugfixes
Over the years, the preferences template became an unmanageable beast. To make
the source code more readable the monolith is splitted into elements. The
splitting into elements also has the advantage that a new template can make use
of them.
The reversed checkbox is a quirk that is only used in the prefereces and must be
eliminated in the long term. For this the macro 'checkbox_onoff_reversed' was
added to the preferences.html template. The 'checkbox' macro is also a quirk of
the preferences.html we don't want to use in other templates (it is an
input-checkbox in a HTML form that was misused for status display).
Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>
