fix: more MSVC warnings (#5137)

src/singletons/NativeMessaging.cpp

@@ -2,6 +2,7 @@
 
 #include "Application.hpp"
 #include "common/Literals.hpp"
+#include "common/Modes.hpp"
 #include "common/QLogging.hpp"
 #include "debug/AssertInGuiThread.hpp"
 #include "providers/twitch/TwitchIrcServer.hpp"
@@ -40,7 +41,7 @@ void registerNmManifest(const Paths &paths, const QString &manifestFilename,
 
 void registerNmHost(const Paths &paths)
 {
-    if (paths.isPortable())
+    if (Modes::instance().isPortable)
     {
         return;
     }

src/singletons/Paths.cpp

@@ -86,7 +86,7 @@ void Paths::initRootDirectory()
 
     this->rootAppDataDirectory = [&]() -> QString {
         // portable
-        if (this->isPortable())
+        if (Modes::instance().isPortable)
         {
             return QCoreApplication::applicationDirPath();
         }

src/singletons/Updates.cpp

@@ -90,7 +90,7 @@ void Updates::installUpdates()
     box->exec();
     QDesktopServices::openUrl(this->updateGuideLink_);
 #elif defined Q_OS_WIN
-    if (this->paths.isPortable())
+    if (Modes::instance().isPortable)
     {
         QMessageBox *box =
             new QMessageBox(QMessageBox::Information, "Chatterino Update",