added icons for user and site tools (FS#2450)

improved toc changes and sidebar toggling

collapse sidebar in mobile view FS#2473

mobile styles for the TOC structure changes

made TOC togling script more generic

Instead of a dedicated function to toggle the TOC we now have a function
that allows to use this functionality everywhere. This will be used to
toggle the sideba

made TOC togling script more generic

Instead of a dedicated function to toggle the TOC we now have a function
that allows to use this functionality everywhere. This will be used to
toggle the sidebar in the mobile view (in an upcoming patch).

Note, this required some changes to the CSS (to make it more generic).
The CSS is still located in the TOC sections but should probably be
moved into its own section instead.

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some tweaks to the pagetool css FS#2481

when there's not enough space for images, make sure they stay proportional (might be FS#2480)

added minimal RTL print styles (part of FS#2185)

improved HTML for search results

Attention: Template authors need to adjust their CSS!

Original structure:
div.search_result >
a.wikilink1 > span.search_cnt
br
div.search_snippet

New structu

improved HTML for search results

Attention: Template authors need to adjust their CSS!

Original structure:
div.search_result >
a.wikilink1 > span.search_cnt
br
div.search_snippet

New structure:
dl.search_results >
dt > a.wikilink1
dd

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rewrote and improved HTML for TOC

Attention: Template authors need to adjust their CSS!

Original structure:
div.toc >
div#toc__header.tocheader.toctoggle > span#toc__toggle.toc_close|toc_open > s

rewrote and improved HTML for TOC

Attention: Template authors need to adjust their CSS!

Original structure:
div.toc >
div#toc__header.tocheader.toctoggle > span#toc__toggle.toc_close|toc_open > span
div#toc__inside > ul.toc > li.level1 > div.li > span.li > a.toc

New structure:
div#dw__toc.open|close >
h3 > strong > span
ul.toc > li.toc > div.li > a

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moved contents of rtl.css into other CSS files

minor changes to gradients: quotes around data-uris and commented css solution

moved the mobile part of the rtl styles (including @media) into mobile.css

load only one stylesheet for all modes instead of three

Instead of three stylesheets for 'all', 'screen' and 'print' modes, they are all loaded into a single stylesheet by wrapping all screen styles

load only one stylesheet for all modes instead of three

Instead of three stylesheets for 'all', 'screen' and 'print' modes, they are all loaded into a single stylesheet by wrapping all screen styles in a "@media screen {}" and all print styles in a "@media print {}". The 'all' mode is not wrapped in anything.
Potential issues with existing CSS: If any of your screen or print CSS files already contain any "@media" syntax, the CSS will probably break. In that case please add any CSS with "@media" in it to the 'all' mode instead!

Also, the 'rtl' mode is hereby deprecated. Please just prefix any RTL styles within your normal CSS files with "[dir=rtl]". This also fixes that RTL styles cannot be added for 'all' or 'print' modes.

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added some wanting classes

renamed smiley image class to 'icon' (FS#1970)

use abbr instead of deprecated acronym

removed names from footnotes and removed anchors from headings altogether

removed all browser-specific gradients as the recently (in 42ff6730) introduced svg makes them unnecessary

removed obsolete template file

added tpl_includeFile() to core

fixed performance issues with gradient in Firefox (which also added gradient support for IE9) (FS#2447)

* removed all occurrences of '-moz-linear-gradient'
* added SVG as fallback for Firefox, IE9 a

fixed performance issues with gradient in Firefox (which also added gradient support for IE9) (FS#2447)

* removed all occurrences of '-moz-linear-gradient'
* added SVG as fallback for Firefox, IE9 and other browsers to page background and buttons

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added accidentally removed '<?php' back in (was in 57fc5edd)

wrapped X-UA-Compatible meta tag with conditional comments

added explanation to todo in _forms.css