Web Inspector: [REGRESSION(r147117)][Elements] Copy/paste keyboard shortcuts broken in "Edit as HTML"
https://bugs.webkit.org/show_bug.cgi?id=113798

Reviewed by Yury Semikhatsky.

Stop propagation of "copy" event from the multiline editor's
CodeMirror host element so that it is not handled by
WebInspector.documentCopy().

* inspector/front-end/UIUtils.js:
(.consumeCopy):
(.cleanUpAfterEditing):
* inspector/front-end/inspector.js:
(WebInspector.addMainEventListeners):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147535 268f45cc-cd09-0410-ab3c-d52691b4dbfc