EXM-25574: Improvements on Open file at caret action.
EXM-30578: Open Image action was added in an image's contextual menu.
Merge branch 'master' of https://github.com/oxygenxml/userguide
EXM-30161: The default Author contextual menu has been reorganized.
Removed irrelevant images. Profiled content for Eclipse plugin.
Merge branch 'dev'

* dev:
  Commit to reverse changes related to issue #35 that broke build
  Commit to illustrate issue #35
  Editing encoding preferences topic