Improve "Install Service" menu (#15571)

service.bat

@@ -242,12 +242,18 @@ for /f "delims=" %%F in ('powershell -NoProfile -Command "Get-ChildItem -Literal
     set "file!count!=%%F"
 )
 
+echo   0. Exit
+
+echo.
+
 :: Choosing file
 set "choice="
-set /p "choice=Input file index (number): "
+set /p "choice=Input option (0-!count!, default: 0): "
 if "!choice!"=="" (
-    echo The choice is empty, exiting...
-    pause
+    set "choice=0"
+)
+
+if "!choice!"=="0" (
     goto menu
 )