Bug 831693 - Experiment with auto completion in Inspector Searchbox, r=paul

--HG--
rename : browser/devtools/webconsole/AutocompletePopup.jsm => browser/devtools/shared/AutocompletePopup.jsm
Bug 835899 - Web Console autocomplete popup could need some UI love, r=msucan, r=paul
Bug 850513 - [style inspector] Remove notification when navigating away with unsaved changes. r=paul