[polybar] Show only icons on task_manager (just the leading letter if icon is missing)

.config/polybar/scripts/task_manager

@@ -39,17 +39,24 @@ get_icon_by_name()
     declare -A ICON_MAP=(
         [tilix]=
         [code]=
-        [firefox]=
-        [chromium]=
-        [nautilus]=
+        [firefox]=
+        [chromium]=
+        [nextcloud]=
         [gnome-calculator]=
         [gnome-calendar]=
+        [gnome-control-center]=
         [eog]=
+        [nautilus]=
         [keepassxc]=
+        [steam]=
+        [skype]=
+        [slack]=
     )
 
     if [ ${ICON_MAP[$name]+_} ]; then
         echo "${ICON_MAP[$name]}"
+    else
+        echo "$name" | cut -c 1 | tr '[:lower:]' '[:upper:]'
     fi
 }
 
@@ -57,6 +64,7 @@ show_tasks()
 {
     max_tasks=$(grep -cE "^\[module/taskbar[0-9]+]" ~/.config/polybar/task_manager.ini)
     wmctrl -lx | awk '{if ($2 > -1) print $3,$1}' \
+               | sed -r 's/([0-9])\.([0-9])/\1\2/g' \
                | awk -F'.' '{ print $NF }' \
                | tail -"$max_tasks" | sort > $STATUS_FILE.current
 
@@ -89,7 +97,8 @@ print_task_name()
         name="$name "
     fi
 
-    printf "%s%s" "${name^}" "$icon"
+    #echo "${name^}${icon}"
+    echo '%{T6}'"$icon"'%{T-}'
 }
 
 get_active_window()