Still working on BkmkMgrs 1.22.23

• Fixed three more bugs in the Lazy Data Source, ContentDataSource
  class:  One in --checkAllProxies:bkmxDoc:, one in
  -objectsChangedNote:, and one in -noteChangedChildrenForStark:.  The
  latter two were quite heinous – changing a stark owned by an Extore
  during an Import or Export would whack live ContentProxy objects out
  of the cache!
• Now supports Firefox Developer Edition
• Reworded the "Stop Syncing" menu item again
• Added comments to category NSMenu (SSYShoeboxDocument) explaining
  that it is not applicble to OS X 10.9 and above
• Now supports Firefox Developer Edition
• Replaced depracated Process Manager function ShowHideProcess() with
  -[NSRunningApplication hide].
• Added new category, NSRunningApplication (SSYHideReliably)
• Added parameter +[SSYOtherApper
  launchApplicationPath:activate:hideGuardTime:error_p:]
• Added new method +[SSYOtherApper
  launchAsHiddenAppPath:launchTimeout:hideGuardTime:error_p:] which
  uses AppleScript, "the only way to reliably launch an app as hidden"
  (unless it's like Google Chrome and throws up a window immediately
  after launch).
• Fixed Header Doc in SSYPathObserver and SSYPathWaiter classes.
• Fixed bug which sometimes caused Firefox or Chrome to be not quit
  after it was launched to perform an import or export operation, if
  the user has more than one instance of Firefox or Chrome installed.
  (Because it would quit an instance that was not even running.  Now
  remembers the path to the launched app.)
• When running one of the three focused apps, the popover which OS X
  10.9 or 10.10 provides next to the document window title has been
  removed, so that it is no longer possible for the user change the
  document's name or location and lose it (because the focused apps
  have a "shoebox" architecture which does not support multiple
  documents.)