This is a very useful idea and helpful especially quicker if you are inputting longer chord names with extensions. I had a quick go but found a few anomalies. I am in the UK so not sure if this maight be a UK computer keyboard issue. I called up B then m7 and it wrote Bb. I found that the m7 produced a flat in any key chord inputted. I used the tool to iput C maj7 and then when I went to the 2nd half of the bar the Cmajor 7 previoulsy there just disappeared. I tried it with some other major 7ths and each time it disappeared when you continued. I also used the undo control in the tool but it removed the previous chord and not the last thing being worked on. Tried inputting a push and it seems you have to call it up first before the chord. This is a problem as I find you are not always sure about adding pushes etc until afterwards.

I think it is a great idea but might need some testing. Have you had other feedback yet?