Merge forwardport of #11430 to 2.3-develop branch

Applied pull request patch https://github.com/magento/magento2/pull/11430.patch (created by @slackerzz) based on commit(s):
  1. 3548000

Fixed GitHub Issues in 2.3-develop branch:
  - #10941: Responsive Design Issue on Mobile with Magento 2.1.9 (reported by @rishabhchd19)

Author: magento-engcom-team

app/design/frontend/Magento/luma/Magento_Catalog/web/css/source/module/_toolbar.less

@@ -44,7 +44,6 @@
             line-height: @toolbar-mode-icon-font-size + 2;
             margin: 0;
             padding: 7px 0;
-            position: absolute;
             text-align: left;
             top: 0;
             vertical-align: middle;