fixed tabs in RTL mode in media manager

made tabs RTL-aware

added minimal RTL print styles

RTL fixes for media manager

improved link icons

minor general img fixes

adjusted search styles to reflect html changes to core search (backwards-compatible)

adjusted toc styles to reflect html changes to core toc (backwards-compatible)

moved contents of rtl.css into other CSS files

adjusted for new additional classes in the core (backwards-compatible for now)

use core tpl_includeFile() if it exists

removed short open tags from some translation files

added X-UA-Compatible to always use the best possible browser mode in IE and give users with Chrome Frame the chance to use it

added mediamanager link to be highlighted when selected

removed a few unnecessary classes and elements before IDs in styles

made images fit better into the horizontal grid

improved closed item in sitemap for RTL languages

changed the way RTL styles are added
Add rtl.css as *screen* style, but append all RTL styles with [dir=rtl].
That has the advantage that all styles are in the same CSS output, so there are no differ

changed the way RTL styles are added
Add rtl.css as *screen* style, but append all RTL styles with [dir=rtl].
That has the advantage that all styles are in the same CSS output, so there are no different requests.

Later on all styles in rtl.css should be moved to their respective "parent" css file.

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whitespace changes: made css codings style more consistent

made styles for .pad and .site more specific to avoid interfering with the same classes somewhere else within the page

fixed swipe diff view

improved minor edits in recent changes

changed 'history' action to 'revisions' (they're synonymous, but 'revisions' is clearer)

have new section highlighting on both sides and improve preview border

tiny change to styling of fullscreen mediamanager first heading