Rename Application->Debug->Show Imap Protocol Log
Since revision 48981ed478ff51133d9498c70a4a2664610983c3
the SMTP traffic is logged when using the setting
SMTP method "NETWORK", in addition to the IMAP traffic.
Future proof this by renaming the menu item to Show protocol
log.
Change-Id: Ide80d202969ae80d05775ff787bbe563087b2ae8
GUI: