Feature Request : Sub Checkpoints

[jayavman]

Add a Sub-checkpoint to the master checkpoint

So beside the checkpoint next to the bin, Should be another + and this would be a sub checkpoint to the main checkpoint. You can add multiple checkpoints to the above checkpoint.

Example :

(checkpoint main) PC probems -
- Fix Ram
- Fix HD
- Fix power
( Checkpoint main) Desktop issue
- Fix Ram
- Fix HD
- Fix power