xsession: switch to awesome, add needed picom option, run dunst with dwm

xsession/.xsession

@@ -28,17 +28,18 @@ xsettingsd &
 
 xsetroot -cursor_name left_ptr
 
-picom -b -I 1 -O 1 -i 1 -e 1 --no-fading-openclose --backend glx || compton -b --no-fading-openclose
-
-if which dwm > /dev/null; then
-    lupan-clock &
-    exec dwm
-fi
+picom -b -I 1 -O 1 -e 1 --no-fading-openclose --backend glx || compton -b --no-fading-openclose
 
 if which awesome > /dev/null; then
     exec awesome
 fi
 
+if which dwm > /dev/null; then
+    dunst &
+    lupan-clock &
+    exec dwm
+fi
+
 if which dk > /dev/null; then
     for m in $(polybar --list-monitors | cut -d: -f1); do
 	MONITOR=$m polybar --reload bar &