Update lxqt-session config with upstream values and Lubuntu-Next specific default

src/etc/xdg/xdg-Lubuntu/lxqt/session.conf

@@ -1,8 +1,26 @@
 [General]
-leave_confirmation=true
 window_manager=openbox
+leave_confirmation=false
 
 [Environment]
-BROWSER=firefox
+BROWSER=qupzilla
 GTK_CSD=0
+GTK_OVERLAY_SCROLLING=0
 TERM=qterminal
+
+[Mouse]
+cursor_size=18
+cursor_theme=DMZ-White
+acc_factor=20
+acc_threshold=10
+left_handed=false
+
+[Keyboard]
+delay=500
+interval=30
+beep=false
+
+[Font]
+antialias=true
+hinting=true
+dpi=96