Description of Problem:

stock-ticker applet wrecks vertical panel appearance bu increasing
its size dramatically.

create vertical panel.
panel->applets->add->network->stock ticker

panel expands widely. No options on preferences about honouring
panel size.

expected results: hmm. _ideally_ it should either scroll down,
changing itself completely. Or it should scroll horizontally
but not expand, even if this means you are going to see one or
two letters at a time. Perhaps it should pick a very tiny font
on a vertical panel if it did the latter?