[TxMt] line breaks in new snippit - 'insert banner text'

[Moshe Weitzman]

this new snippit in the 'Source' group is cool. It would be even cooler 
if it did the right thing when user hits the enter key within the banner 
text. The right thing would be insert a new banner line below current 
line and put cursor in its usual starting position on the new line.

Entering a new line character currently breaks the banner in an ugly way.