as fixing a few small livemark bugs, now that I've fixed a couple reference
leaks in nsLivemarkService (see bugs 333764 and 333784).
NOTE: I expect this to cause an increase in allocations on branch balsa,
since it causes nsLivemarkService to be instantiated to set up the menus.
(nsLivemarkService previously wasn't used in the balsa bloat test)
bug=330063
r=annie.sullivan@gmail.comsr=ben@mozilla.org
