Restore enableWebfonts pref and remove uls-enable

This patch restores the enableWebfonts preference, stored inside
the uls-preferences blob. It existed as 'enable-webfonts' in
the past and was removed in
If735a733717596fae03042c5e277bd538bd8501f

Each wiki can be configured to load the fonts by default
using the new global variable $wgULSWebfontsEnabled.
Its default value is true (to load fonts).

This also removes the preference 'uls-enable', recently added in
I71b70d8ee7c3cad7f49b32e5dc494ef4fc1bdb2f

The initialization of ext.uls.webfonts.js is changed as well,
so that minimal webfonts JS library code is loaded,
and the rest is loaded only if a user requests it.

Bug: 60304
Change-Id: I49e812eae32266f165591c75fd67b86ca06b13f0

Resources.php

@@ -147,11 +147,16 @@ $wgResourceModules['ext.uls.preferences'] = array(
 $wgResourceModules['ext.uls.webfonts'] = array(
 	'scripts' => 'resources/js/ext.uls.webfonts.js',
 	'dependencies' => array(
-		'jquery.webfonts',
 		'ext.uls.init',
+		'ext.uls.preferences',
+	),
+) + $resourcePaths;
+
+$wgResourceModules['ext.uls.webfonts.fonts'] = array(
+	'dependencies' => array(
+		'jquery.webfonts',
 		'jquery.uls.data',
 		'ext.uls.webfonts.repository',
-		'ext.uls.preferences',
 	),
 ) + $resourcePaths;