Tidy up the KolibriOS support

quickemu

@@ -488,9 +488,6 @@ function vm_boot() {
       fi
       MACHINE_TYPE="pc"
       NET_DEVICE="rtl8139"
-      if [ -z "${disk_size}" ]; then
-        disk_size="256M"
-      fi
       ;;
     macos)
       #https://www.nicksherlock.com/2020/06/installing-macos-big-sur-on-proxmox/
@@ -927,13 +924,6 @@ function vm_boot() {
     args+=(-drive if=floppy,format=raw,file="${floppy}")
   fi
 
-  # Since there is bug (probably) in KolibriOS: cdrom indexes 0 or 1 make system show an extra unexisting iso, so we use index=2
-  if [ -n "${iso}" ] && [ "${guest_os}" == "kolibrios" ]; then
-    # shellcheck disable=SC2054
-    args+=(-drive media=cdrom,index=2,file="${iso}")
-    iso=""
-  fi
-
   if [ -n "${iso}" ]; then
     # shellcheck disable=SC2054
     args+=(-drive media=cdrom,index=0,file="${iso}")
@@ -944,8 +934,13 @@ function vm_boot() {
     args+=(-drive media=cdrom,index=1,file="${fixed_iso}")
   fi
 
+  if [ -n "${iso}" ] && [ "${guest_os}" == "kolibrios" ]; then
+    # Since there is bug (probably) in KolibriOS: cdrom indexes 0 or 1 make system show an extra unexisting iso, so we use index=2
+    # shellcheck disable=SC2054
+    args+=(-drive media=cdrom,index=2,file="${iso}")
+    iso=""
+  elif [ -n "${iso}" ] && [ "${guest_os}" == "windows" ] && [ -e "${VMDIR}/unattended.iso" ]; then
     # Attach the unattended configuration to Windows guests when booting from ISO
-  if [ -n "${iso}" ] && [ "${guest_os}" == "windows" ] && [ -e "${VMDIR}/unattended.iso" ]; then
     # shellcheck disable=SC2054
     args+=(-drive media=cdrom,index=2,file="${VMDIR}/unattended.iso")
   fi