grub: Add save default item support for more items

features.in/grub/cfg.in/25install-vnc-connect.cfg

 
 menuentry $"VNC install "'@distro@'$" (edit to set server IP address)" --id 'vncconnect' {
+  savedefault
   linux$linux_suffix /boot/vmlinuz$KFLAVOUR fastboot @initrd_bootargs@ @stagename@=altinst ramdisk_size=@altinst_size@ showopts @bootargs@ $EFI_BOOTARGS headless no_alt_virt_keyboard vncconnect=IP lang=$lang
   initrd$linux_suffix /boot/@initrd@$KFLAVOUR.@initrd_ext@
 }

features.in/grub/cfg.in/25install-vnc-listen.cfg

 
 menuentry $"VNC install "'@distro@'$" (edit to set password and connect here)" --id 'vncpasswd' {
+  savedefault
   linux$linux_suffix /boot/vmlinuz$KFLAVOUR fastboot @initrd_bootargs@ @stagename@=altinst ramdisk_size=@altinst_size@ showopts @bootargs@ $EFI_BOOTARGS headless no_alt_virt_keyboard vncpassword=VNCPWD lang=$lang
   initrd$linux_suffix /boot/@initrd@$KFLAVOUR.@initrd_ext@
 }

features.in/grub/cfg.in/83rescue_fm.cfg

 menuentry $"Forensic mode (leave disks alone)" --id 'rescue_forensic' {
+  savedefault
   echo $"Loading Linux vmlinuz$KFLAVOUR ..."
   linux$linux_suffix /boot/vmlinuz fastboot live @initrd_bootargs@ @stagename@=rescue ramdisk_size=@rescue_size@ splash=0 showopts @rescue_bootargs@ $EFI_BOOTARGS max_loop=16 forensic hash=@rescue_hash@
   echo $"Loading initial ramdisk ..."

features.in/grub/cfg.in/84rescue_remote.cfg

 menuentry $"Rescue with remote SSH access (DHCP)" --id 'rescue_remote' {
+  savedefault
   linux$linux_suffix /boot/vmlinuz$KFLAVOUR fastboot live @initrd_bootargs@ @stagename@=rescue ramdisk_size=@rescue_size@ splash=0 showopts @rescue_bootargs@ $EFI_BOOTARGS max_loop=16 ip=dhcp port=22 rootpw=AUTO hash=@rescue_hash@
   echo $"Loading initial ramdisk ..."
   initrd$linux_suffix /boot/@initrd@$KFLAVOUR.@initrd_ext@