[imp] IMP "Insert Signature" when changing Identities in a New Message

[Brian Leggee]

   I use multiple Identities ... and when I select "New Message", the  
Signature of my Default Identity is there ... but then when I switch  
the Identity before I start typing a New Message, I still have the  
same Default Signature (even though all 4 of my Identities have their  
own Signatures setup in Options). 

   Is there a way to fix this, like:
1. Start a New Message with the chosen Identity so that the correct  
Signature is there
OR maybe
2. An "Insert Signature" option
OR
3. Anything else that might work?