MDL-44168 html: border=1 on regexdetect table

Conflicts:
	theme/bootstrapbase/style/moodle.css

lib/adminlib.php

@@ -8445,7 +8445,7 @@ class admin_setting_devicedetectregex extends admin_setting {
     public function output_html($data, $query='') {
         global $OUTPUT;
 
-        $out  = html_writer::start_tag('table', array('border' => 1, 'class' => 'generaltable'));
+        $out  = html_writer::start_tag('table', array('class' => 'generaltable'));
         $out .= html_writer::start_tag('thead');
         $out .= html_writer::start_tag('tr');
         $out .= html_writer::tag('th', get_string('devicedetectregexexpression', 'admin'));

theme/bootstrapbase/less/moodle/admin.less

@@ -447,11 +447,6 @@ img.iconsmall {
     margin-left: 0.5em;
 }
 
-#admin-devicedetectregex table {
-    border: none;
-    // Override a table border=1 in the HTML.
-}
-
 #admin-emoticons td input {
     width: 8em;
 }