Fix the chat widget jumping around when unfolded

Setting the minimum size was making the widget taller and changing bottom(),
breaking geometry computations afterwards. Save the geometry before calling
setMinimumSize().

client/chatline.cpp

@@ -340,6 +340,9 @@ void chat_widget::set_chat_visible(bool visible)
   // Don't update chat_fheight
   m_chat_visible = false;
 
+  // Save the geometry before setting the minimum size
+  auto geo = geometry();
+
   if (visible) {
     setMinimumSize(200, 100);
     setResizable(Qt::LeftEdge | Qt::RightEdge | Qt::TopEdge
@@ -366,7 +369,6 @@ void chat_widget::set_chat_visible(bool visible)
                                             : QLatin1String("expand-down");
   show_hide->setIcon(fcIcons::instance()->getIcon(icon_name));
 
-  auto geo = geometry();
   if (expand_up) {
     geo.setTop(std::max(geo.bottom() - h, 0));
     geo.setHeight(h);