Bug#420707: iceape: explicit helper apps settings should always override plugins'

[Paolo]

Package: iceape
Version: 1.0.8-4
Severity: important

hi,

this bug breaks usability and cause much grief to end user: I need a 
special viewer for .tif, since the plugin's default isn't good for G[34] 
TIFFs. It's just fine for anything else. Hence I set an explicit helper
for image/tif, I also set the 'Always ask me ...' checkbox; but on confirm 
it says 'Iceape can handle this type internally, for such type a helper app
will only be invoked if the server request external handling'.

The program is supposed to follow end user's _explict_ request, set in the 
provided setup box.
Besides, such 'internal handling override' isn't documented in the help.

thanks
--
paolo