TYPO3 Core

In TYPO3 CMS 7.6 and up a back button should be rendered (in the left doc header button section) of the list module if url parameter returnUrl is set.

Function DatabaseRecordList->getDocHeaderButtons() uses TYPO3\CMS\Backend\Template\Components\ButtonBar to register buttons. it looks like as the back button was forgotten in https://github.com/TYPO3/TYPO3.CMS/commit/79cf7c711e9dea52e39eaa28dd9fde68f10e23c7#diff-42cfb88bd58fd064d043722f827b1cc5.

            // Back
            if ($this->returnUrl) {
                $href = htmlspecialchars(GeneralUtility::linkThisUrl($this->returnUrl, ['id' => $this->id]));
                $buttons['back'] = '<a href="' . $href . '" class="typo3-goBack" title="'
                    . $lang->sL('LLL:EXT:lang/locallang_core.xlf:labels.goBack', true) . '">'
                    . $this->iconFactory->getIcon('actions-view-go-back', Icon::SIZE_SMALL) . '</a>';
            }

... should be replaced with something like ...

            // Back
            if ($this->returnUrl) {
                $backButton = $buttonBar->makeLinkButton()
                    ->setHref($this->returnUrl)
                    ->setTitle($lang->sL('LLL:EXT:lang/locallang_core.xlf:labels.goBack'))
                    ->setIcon($this->iconFactory->getIcon('actions-view-go-back', Icon::SIZE_SMALL));
                $buttonBar->addButton($backButton, ButtonBar::BUTTON_POSITION_LEFT);
            }

• 7.6 https://github.com/TYPO3/TYPO3.CMS/blob/TYPO3_7-6/typo3/sysext/recordlist/Classes/RecordList/DatabaseRecordList.php#L483
• 8.7 https://github.com/TYPO3/TYPO3.CMS/blob/TYPO3_8-7/typo3/sysext/recordlist/Classes/RecordList/DatabaseRecordList.php#L486
• Master https://github.com/TYPO3/TYPO3.CMS/blob/master/typo3/sysext/recordlist/Classes/RecordList/DatabaseRecordList.php#L486