fixed title string
added variables for adding historysteps
added history update logic
added logic for history update
Added logic for updating history while inserting and deleting bases
changed edit view file
added history logic and edit tab logic
added edit tab valid logic to sequence model
added edit tab valid logic to sequence model
added edit tab valid logic to sequence model
fixed record history functions
adding logic for undo method
added logic for undo feature
added logic to handle undo when feature is deleted through base deletion.
fixed bug
Added modular logic for history undo for features
completed logic for undo feature history
finished undo logic for features
fixed logic issues
fixed bugs related to deletion and recreation of features