Correct search icon

In Ie5ec06152c418c4aa1b620b3d0a904cc9517e5d0 we merged two search
icons. On retrospect, these icons were not the same - one was bigger
than the other.
(see https://phabricator.wikimedia.org/T199000#4501790)

This change replaces the icon with the correct one.

Bug: T199000
Change-Id: Ieca1b4cc72bb782c15c0c53fe4721deb1ee041fc

resources/skins.minerva.content.styles.images/magnifying-glass.svg

@@ -1 +1 @@
-<?xml version="1.0" encoding="UTF-8"?><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><path fill="#72777d" d="M5.9 15.2c1.2 1.2 2.7 1.8 4.4 1.8 1.5 0 2.9-.5 4-1.4l4.3 3.9s1-.3 1.3-1.4l-4.3-3.9c1.6-2.4 1.3-5.7-.8-7.8-1.2-1.2-2.7-1.8-4.4-1.8-1.7-.1-3.3.6-4.4 1.8-2.5 2.4-2.5 6.4-.1 8.8zM7 7.7s.1-.1.2-.1c.9-.9 2-1.3 3.2-1.3 1.2 0 2.4.5 3.2 1.3 1.8 1.8 1.8 4.7 0 6.4-.9.9-2 1.3-3.2 1.3-1.2 0-2.4-.5-3.2-1.3-1.8-1.7-1.8-4.5-.2-6.3z"/></svg>
+<?xml version="1.0" encoding="UTF-8"?><svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24"><title>magnifying glass</title><path fill="#54595d" fill-rule="evenodd" d="M16.474 15.44c1.147-1.375 1.835-3.21 1.835-5.16a7.98 7.98 0 0 0-8.03-8.03 7.98 7.98 0 0 0-8.03 8.03 7.98 7.98 0 0 0 8.03 8.03c1.72 0 3.21-.46 4.47-1.378l4.473 4.474c.46.46 1.262.46 1.836 0l.69-.688-5.278-5.277zm-11.93-5.16c0-3.21 2.524-5.735 5.735-5.735 3.21 0 5.732 2.524 5.732 5.735 0 3.212-2.524 5.736-5.736 5.736-3.212 0-5.736-2.638-5.736-5.736z"/></svg>