implements the first part, working for configured variants;
for that, loading of stylesheets was overhauled by now
merging all configured variants into one big stylesheet for
each output format and loading this instead of one stylesheet
per configured variant;
previously @media print styles were applied on top of @media screen
styles; this is now strictly isolated, which doesn't require styles
like neon to revert styles for print anymore;
this change was also used to implement the minify parameter, to shrink
those generated stylesheets, making them shrink to 66% of their
unminified size for the exampleSite;
the theme switcher functionality is now completely independend of
variant.js; the switch is now handled by in-page javascript which
avoids waiting for external scripts to load, so switching can happen
as early as possible;
switching of themes is now implemented by just setting a data attribute
to the html element, were previously a complex mechanism of dynamically
loading of variant CSS files was implemented;
the call for variant.js was removed in this changeset, making the
generator broken and useless; this will be fixed with the next patch;
because sizing and positioning was a mess;
the follwing things are fixed with this:
- resizes and positions correctly according to html elements font-size
- IE11 compatiblity is now given
- a11y: expander is now correctly given a focus outline
- chevron is now coded into html instead of a css content value, which makes it easier to change (was an issue in the past)
- the visited checkmark now breaks correctly on long lines and hides behind the text if necessary
- some more css classes were introduced to make further extensions (eg. nested shortcut links) easier
