chat: major UI redesign for v3.0.0 (#2396)

Signed-off-by: Adam Treat <treat.adam@gmail.com>
Signed-off-by: Jared Van Bortel <jared@nomic.ai>
Co-authored-by: Jared Van Bortel <jared@nomic.ai>

gpt4all-chat/main.cpp

@@ -15,9 +15,10 @@
 #include <QObject>
 #include <QQmlApplicationEngine>
 #include <QQmlEngine>
+#include <QSettings>
 #include <QString>
-#include <Qt>
 #include <QUrl>
+#include <Qt>
 
 int main(int argc, char *argv[])
 {
@@ -25,6 +26,7 @@ int main(int argc, char *argv[])
     QCoreApplication::setOrganizationDomain("gpt4all.io");
     QCoreApplication::setApplicationName("GPT4All");
     QCoreApplication::setApplicationVersion(APP_VERSION);
+    QSettings::setDefaultFormat(QSettings::IniFormat);
 
     Logger::globalInstance();