[w3c/editing] Update EditContext explainer and associated examples (#303)

This PR adds a new section "Difference between DIV with Contenteditable and DIV with EditContext" to the explainer and updates examples/WebIDL sections to reflect the latest status of the EditContext development.
You can view, comment on, or merge this pull request online at:

  https://github.com/w3c/editing/pull/303

-- Commit Summary --

  * update idl
  * contenteditable vs editContext
  * add examples
  * finish event table
  * minor revision
  * revise contenteditable vs editcontext
  * update graph and udpate the difference section
  * fix upper case
  * revise
  * clean up selection_demo.html
  * remove focus()/blur()

-- File Changes --

    A docs/EditContext/contentEditable_vs_editContext.png (0)
    A docs/EditContext/contenteditable_vs_editcontext.jpg (0)
    M docs/EditContext/edit_context_demo.html (3)
    M docs/EditContext/explainer.md (109)
    A docs/EditContext/native_selection_demo.html (109)

-- Patch Links --

https://github.com/w3c/editing/pull/303.patch
https://github.com/w3c/editing/pull/303.diff

-- 
You are receiving this because you are subscribed to this thread.
Reply to this email directly or view it on GitHub:
https://github.com/w3c/editing/pull/303