Fix roomlist "jumping around".

Remove custom DPI code from main.cpp.
Hide redacted event in roomlist.

src/main.cpp

@@ -26,18 +26,6 @@
 using namespace QMatrixClient;
 
 int main(int argc, char* argv[]) {
-#if defined(Q_OS_LINUX) || defined(Q_OS_WIN) || defined(Q_OS_FREEBSD)
-  if (qgetenv("QT_SCALE_FACTOR").size() == 0) {
-    QSettings settings("ENCOM", "Spectral");
-    float factor = settings.value("Interface/dpi", 100).toFloat() / 100;
-
-    qDebug() << "DPI:" << factor;
-
-    if (factor != -1)
-      qputenv("QT_SCALE_FACTOR", QString::number(factor).toUtf8());
-  }
-#endif
-
   QCoreApplication::setAttribute(Qt::AA_UseOpenGLES);
 
   QNetworkProxyFactory::setUseSystemConfiguration(true);