To can improve items locked it is a good think but give also some problems:
1- Seeing items in bank can give a very long list if you have many there
2- To have to write "CONFIRM" it is longer that unlock and re-lock the item
I suggest for a next update:
- Put a flag in improvement window to see only what you have in bag or dressed and/or what you have in bank
- A simple confirm box should be sufficient: if one person select the item, then put resins/tannins/tempers should be quite sure that he/she want to improve that item