Bug 1857999: Move XML stylesheet processing instructions to link elements. r=Gijs,webdriver-reviewers,settings-reviewers,application-update-reviewers,devtools-reviewers,places-reviewers,Standard8,whimboo,bytesized,ochameau

The result of running the automated script available at https://github.com/Mossop/depi

Differential Revision: https://phabricator.services.mozilla.com/D190681

browser/components/migration/content/migration.xhtml

@@ -3,8 +3,6 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this
 # file, You can obtain one at http://mozilla.org/MPL/2.0/.
 
-<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
-
 <window id="migrationWizard"
         xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
         xmlns:html="http://www.w3.org/1999/xhtml"
@@ -15,6 +13,8 @@
         style="min-width: 40em;"
         buttons="accept,cancel">
 <linkset>
+  <html:link rel="stylesheet" href="chrome://global/skin/global.css" />
+
   <html:link rel="localization" href="branding/brand.ftl"/>
   <html:link rel="localization" href="toolkit/global/wizard.ftl"/>
   <html:link rel="localization" href="browser/migration.ftl"/>