Change Dunst Config & Fix Launch Script

- Change dunstrc text alignment to center
- Add appname to dunst notifications
- Change dunst separator color to auto
- Fix launch_dunst.sh to be executable and get values before running dunst
- Add updated polybar module icon
- Add executable permissions to launch_dunst.sh

.config/dunst/dunstrc

@@ -72,7 +72,7 @@
     #  * foreground: use the same color as the foreground;
     #  * frame: use the same color as the frame;
     #  * anything else will be interpreted as a X color.
-    separator_color = frame
+    separator_color = auto
 
     # Sort messages by urgency.
     sort = yes
@@ -126,11 +126,11 @@
     #   %n  progress value if set without any extra characters
     #   %%  Literal %
     # Markup is allowed
-    format = "<b>%s</b> %p\n%b"
+    format = "<b>%s</b> | <i>%a</i> %p\n%b"
 
     # Alignment of message text.
     # Possible values are "left", "center" and "right".
-    alignment = left
+    alignment = center
 
     # Vertical alignment of message text and icon.
     # Possible values are "top", "center" and "bottom".