Button click in meeting wants to save meeting as changed

This happens often when I accept a meeting. It thinks the meeting has changed and therefore wants to save it. This in of itself isn’t too annoying, but the issue is this is a modal that freezes the whole mail app. This dialog box appears non system modal, IE it can be hidden. However EMclient is frozen waiting for this button. Sometimes I have to hunt down the window and close it.

What I would like to see, “A” being the best.
a) keep the save mechanism but do not set “dirty” if a button is clicked in the description
or
b) do not make this a app modal dialog