Update jquery.uls from upstream

Upstream: https://github.com/wikimedia/jquery.uls
Changes:
* Optimize all SVGs.
* Bug 60815: Add rwr and ota to the languages supported by ULS.
* Drop -moz-linear-gradient for images.
* Localisation updates from https://translatewiki.net.

Change-Id: I3455db4ec0b9ffd8f0a29d41e8ef56309e9c59d2

lib/jquery.uls/images/clear.svg

@@ -1,44 +1 @@
-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!-- Created with Inkscape (http://www.inkscape.org/) -->
-
-<svg
-   xmlns:dc="http://purl.org/dc/elements/1.1/"
-   xmlns:cc="http://creativecommons.org/ns#"
-   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
-   xmlns:svg="http://www.w3.org/2000/svg"
-   xmlns="http://www.w3.org/2000/svg"
-   version="1.1"
-   width="12.520475"
-   height="12.52047"
-   id="svg2">
-  <defs
-     id="defs4" />
-  <metadata
-     id="metadata7">
-    <rdf:RDF>
-      <cc:Work
-         rdf:about="">
-        <dc:format>image/svg+xml</dc:format>
-        <dc:type
-           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
-        <dc:title></dc:title>
-      </cc:Work>
-    </rdf:RDF>
-  </metadata>
-  <rect
-     width="1.6884073"
-     height="16.018188"
-     x="-0.84419048"
-     y="0.84421676"
-     transform="matrix(0.70710678,-0.70710678,0.70710678,0.70710678,0,0)"
-     id="rect9372-5-6-44-7-7-7-4"
-     style="fill:#555555;fill-opacity:1;stroke:none" />
-  <rect
-     width="1.6884073"
-     height="16.018188"
-     x="8.0091028"
-     y="-8.0090809"
-     transform="matrix(0.70710678,0.70710678,-0.70710678,0.70710678,0,0)"
-     id="rect9372-5-6-44-7-7-7-4-0"
-     style="fill:#555555;fill-opacity:1;stroke:none" />
-</svg>
+<?xml version="1.0" encoding="UTF-8"?><svg xmlns="http://www.w3.org/2000/svg" width="12.52" height="12.52"><rect width="1.688" height="16.018" x="-.844" y=".844" transform="rotate(-45)" fill="#555"/><rect width="1.688" height="16.018" x="8.009" y="-8.009" transform="rotate(45)" fill="#555"/></svg>