A note in the user guide says "Only R15B nodes can be observed". This
note was written because the observer_backend module did not exist in
earlier releases. It should have said "R15B or later". However, now
that we are on OTP-17, we don't think the note is necessary anymore so
it is now removed.

* siri/wx-cdv/OTP-11179:
  observer: cosmetic gui tweaks
  observer: Fix progress dialog creation
  observer: renamed crashdump_viewer files and fixed makefiles
  observer: improve wx version of crashdump_viewer
  observer: Use crashdump_viewer's term viewer to display large terms and binaries
  observer: Fix memory and scheduler info and handle missing fields
  observer: Optimize row lookups
  observer: improve wx version of crashdump_viewer
  observer: Consolidate the view of process information
  observer: add wx version of crashdump_viewer

The old web base crashdump_viewer is now removed.