weird crashes, lock-ups etc.
The format has changed, Resources/Throbber now needs to be in a picture.datatype
format, as a "film strip" of frames with the first image the inactive (stopped
throbber) and the rest the active animation. The number of frames needs to be set in
the Options file throbber_frames variable (currently - will probably move to a
tooltype of Resources/Throbber in the future for better theming ability)
svn path=/trunk/netsurf/; revision=5310