TYPO3 Core

+1, I like the idea. Should this be a global option or one for each note item. I could imagine a new backend user setting for this.

+1, me too! I also like the idea of a setting (USER TSConfig or PAGE TSConfig)

+1

+1

+1

This patch works fine for me. Tested with TYPO3 8.7.
Note: this patch will not be integrated in TYPO3 8.7 due to the feature freeze.

If you want to use it with TYPO3 8.7, you can xclass the core or patch it if you use Composer:
- composer require cweagans/composer-patches
- download the diff from Gerrit: https://review.typo3.org/changes/55423/revisions/80047d68ebf19944613682d320e3089c34be5fd2/patch?zip
- put the patch file to build/patches or a similar location
- add this to the "extra" section of your composer.json

"patches": {
    "typo3/cms": {
        "Hook for sys_notes #61170": "build/patches/80047d6.diff" 
    }
}

// reset hook from sys_note to render notes at the bottom of the list module
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['recordlist/Modules/Recordlist/index.php']['drawFooterHook']['sys_note'] = '';

// render sys_note notes in the header instead
$GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['recordlist/Modules/Recordlist/index.php']['drawHeaderHook']['sys_note'] = \TYPO3\CMS\SysNote\Hook\RecordListHook::class . '->render';

Well, the hook is now available to place sys_notes records on top of the list module.
But I think what Bernd Wilke had in mind was a more configurable solution.
Currently you need to put some PHP code e.g. to your theme package to tackle this.
For me it's sufficent but for other integrators it might be more useful to have a configuration option in EM or via TSConfig.

Use this code to remove the rendering in the footer. Setting the function name to an empty string will make the BE try calling a not existing funcition, resulting in a debug message in the BE (depending on your settings).

// reset hook from sys_note to render notes at the bottom of the list module
unset($GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['recordlist/Modules/Recordlist/index.php']['drawFooterHook']['sys_note']);