Add bottom margin to consent checkbox, mark mobile number as required

includes/pages/guest_login.php

@@ -336,7 +336,7 @@ function guest_register()
                 div('col', [
                     form_text(
                         'mobile',
-                        __('Mobile'),
+                        __('Mobile') . ' ' . entry_required(),
                         $mobile,
                         false,
                         40,

includes/sys_form.php

@@ -177,7 +177,7 @@ function form_checkbox($name, $label, $selected, $value = 'checked', $html_id =
         $html_id = $name;
     }
 
-    return '<div class="checkbox"><label>'
+    return '<div class="checkbox mb-3"><label>'
         . '<input type="checkbox" id="' . $html_id . '" name="' . $name . '" value="' . htmlspecialchars((string)$value) . '" '
         . ($selected ? ' checked="checked"' : '') . ' /> '
         . $label