[TASK] Prevent some undefined array key warnings for php8

Related #692

Signed-off-by: Marcus Schwemer <marcus.schwemer@in2code.de>

Author: mschwemer

Classes/Domain/Service/Mail/SendMailService.php

@@ -507,7 +507,9 @@ protected function initialize(Mail $mail, array $settings, string $type): void
         $this->mail = $mail;
         $this->settings = $settings;
         $this->configuration = $this->getConfigurationFromSettings($settings);
-        $this->overwriteConfig = $this->configuration[$type . '.']['overwrite.'];
+        if (\TYPO3\CMS\Core\Utility\ArrayUtility::isValidPath($this->configuration, $type . './overwrite')) {
+            $this->overwriteConfig = $this->configuration[$type . '.']['overwrite.'];
+        }
         $mailRepository = ObjectUtility::getObjectManager()->get(MailRepository::class);
         ObjectUtility::getContentObject()->start($mailRepository->getVariablesWithMarkersFromMail($mail));
         $this->type = $type;

Classes/ViewHelpers/Condition/IsNotExcludedFromPowermailAllViewHelper.php

@@ -90,6 +90,7 @@ protected function getExcludedValues(
         string $configurationType = 'excludeFromFieldTypes'
     ): array {
         if (
+            isset($this->typeToTypoScriptType[$type]) &&
             ArrayUtility::isValidPath($settings, 'excludeFromPowermailAllMarker/' . $this->typeToTypoScriptType[$type] . '/' . $configurationType)
             && !empty($settings['excludeFromPowermailAllMarker'][$this->typeToTypoScriptType[$type]][$configurationType])
         ) {

Classes/ViewHelpers/Misc/ManipulateValueWithTypoScriptViewHelper.php

@@ -58,7 +58,9 @@ public function render(): string
         $type = $this->arguments['type'];
         $value = $this->renderChildren();
         if ($answer->getField()) {
-            if (!empty($this->typoScriptContext[$this->typeToTsType[$type] . '.'][$answer->getField()->getMarker()])) {
+            if (
+                isset($this->typeToTypoScriptType[$type]) &&
+                !empty($this->typoScriptContext[$this->typeToTsType[$type] . '.'][$answer->getField()->getMarker()])) {
                 $this->contentObjectRenderer->start($answer->_getProperties());
                 $value = $this->contentObjectRenderer->cObjGetSingle(
                     $this->typoScriptContext[$this->typeToTsType[$type] . '.'][$answer->getField()->getMarker()],