jfjoch_viewer: Some placement improvement

viewer/JFJochViewerWindow.cpp

@@ -62,12 +62,15 @@ JFJochViewerWindow::JFJochViewerWindow(QWidget *parent, bool dbus, const QString
     h_splitter->addWidget(viewer);
 
     auto side_panel = new JFJochViewerSidePanel(this);
-    side_panel->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
     auto side_panel_scroll = new QScrollArea(this);
     side_panel_scroll->setWidget(side_panel);
     side_panel_scroll->setWidgetResizable(true);
     side_panel_scroll->setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
     side_panel_scroll->setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
+    side_panel_scroll->setMinimumWidth(200);
+    side_panel_scroll->setMaximumWidth(500);
+    side_panel_scroll->setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Minimum);
+
     h_splitter->addWidget(side_panel_scroll);
 
     dataset_info = new JFJochViewerDatasetInfo(this);