[BUGFIX] Fix detection of local settings in settings overview

Site local settings (defined in the sites settings.yaml file)
need to be taken into account in the site overview, only
if they are based on definitions. Therefore the setting
map (which is based on definitions) has to be evaluated
instead of the flat settings map (which contains all
settings, defined and legacy anonymous settings).

Releases: main
Resolves: #104886
Related: #104794
Change-Id: I49f8d01c3947302ff75a6aac0e3e64cdeca819c8
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/85998


Tested-by: Oliver Bartsch <bo@cedev.de>
Tested-by: core-ci <typo3@b13.com>
Reviewed-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Benjamin Franzke <ben@bnf.dev>
Tested-by: Benjamin Kott <benjamin.kott@outlook.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Benjamin Kott <benjamin.kott@outlook.com>

typo3/sysext/backend/Resources/Private/Templates/SiteSettings/Overview.html

@@ -23,7 +23,7 @@
                         </p>
                     </details>
 
-                    <f:if condition="{c.localSettings.allFlat->f:count()} > 0">
+                    <f:if condition="{c.localSettings.map->f:count()} > 0">
                         <details open name="details-{c.site.identifier}">
                             <summary><f:translate key="LLL:EXT:backend/Resources/Private/Language/locallang_sitesettings.xlf:overview.customSettingsSummary" arguments="{0: '{c.localSettings.map->f:count()}'}"/></summary>
                             <p>