refactoring changes from sequpgrade (endReturn, ...) and some modernizations

seqs/kodi.sh

@@ -71,7 +71,7 @@ After = systemd-user-sessions.service network.target sound.target
 # Wants = mysql.service
 
 [Service]
-User = ${toolUser} 
+User = ${toolUser}
 Group = ${toolUser}
 Type = simple
 ExecStart = /usr/bin/kodi-standalone
@@ -80,7 +80,7 @@ Restart = always
 RestartSec = 15
 
 [Install]
-WantedBy = multi-user.target" 
+WantedBy = multi-user.target"
 
 step_5_info() { echo "Enable text input for USB keyboards within $toolName"; }
 step_5() {
@@ -107,7 +107,7 @@ bootConfigLoc="/boot/config.txt"
 bootConfig="
 # Modifications for $toolName
 start_x=1
-gpu_mem=320" 
+gpu_mem=320"
 
 step_7_info() { echo "Reboot is needed for all changes to take effect"; }
 step_7() {
@@ -192,7 +192,7 @@ step_40() {
     info "$i"
   done
   interactive && read -r -p "Are you sure? (y)/[n] " answer
-  case "$answer" in 
+  case "$answer" in
     y|Y)
       exe rm "${musicDb[@]}";;
     *)