chore: MainWindow, use system correct monospace font for log

src/lib/gui/MainWindow.cpp

@@ -85,6 +85,14 @@ MainWindow::MainWindow()
 {
   ui->setupUi(this);
 
+  // setup the log font
+  ui->textLog->setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
+#ifdef Q_OS_MAC
+  auto f = ui->textLog->font();
+  f.setPixelSize(12);
+  ui->textLog->setFont(f);
+#endif
+
   // Setup Actions
   m_actionAbout->setText(tr("About %1...").arg(kAppName));
   m_actionAbout->setMenuRole(QAction::AboutRole);

src/lib/gui/MainWindow.ui

@@ -424,12 +424,6 @@
            <verstretch>0</verstretch>
           </sizepolicy>
          </property>
-         <property name="font">
-          <font>
-           <family>Courier</family>
-           <kerning>true</kerning>
-          </font>
-         </property>
          <property name="lineWrapMode">
           <enum>QPlainTextEdit::LineWrapMode::NoWrap</enum>
          </property>