[MinimizeToTray] minimazetotray icon caption

[Tomáš Petržilka]

Hi,

first I would like to express my thanks to creators of this 
the-most-needed-extension.

Second I would like to suggest to give the icon caption regular 
expression, starting at TH:mail-account-name, or 
Thunderbird:mail-account-name etc. The thing is that it will always 
start with TH or thunderbird. This all will be mostly useful when 
telling windows XP, how to treat this icon, if it should be always 
visible or hidden,etc. Current caption is always changing according to 
selected account and folder, therefore the icon is not uniqually 
recognizable for Windows XP and therefore not manageable..

Thanks