Replace previously selected text with the new equation from panel

[fbob]

I use sidemath more and more and really enjoy it : it is so useful, thanks !
I notice that productivity/smoothness may be enhanced if the edited formula in the panel could replace "automatically" the previous selected text rather than do a copy and past. Maybe just add a button to do the replacement.
Sorry if this feature already exist and I do not use it properly but it may be another great addition to this even greater plugin.
Thanks !