fix: supported image formats are case sensitive

check for the (supported) extension in case insensitive manner

Fixes #12835

ui/StatusQ/src/QClipboardProxy.cpp

@@ -76,7 +76,7 @@ bool QClipboardProxy::isValidImageUrl(const QUrl& url, const QStringList& accept
 {
     const auto strippedUrl = url.url(QUrl::RemoveAuthority | QUrl::RemoveFragment | QUrl::RemoveQuery);
     return std::any_of(acceptedExtensions.constBegin(), acceptedExtensions.constEnd(), [strippedUrl](const auto & ext) {
-        return strippedUrl.endsWith(ext);
+        return strippedUrl.endsWith(ext, Qt::CaseInsensitive);
     });
 }