SparkWidget: generalize autofocusing capability
TESTING: Local ace.dart package
Updated annotations to use setAnnotations per ace.dart change in 1.8
switched to gotoLine and removed selection code
Fix for walkFiles --> (entry as chrome.ChromeFileEntry) does not work if entry is a chrome.DirectoryEntry, however the opposite does work.
Fix.
Improve git clone dialog.
more fixes.
merge upstream/master
widgets have extends=" spark-widget\
Fixed menu button image in deployed version (#537)
Merge pull request #717 from dinhviethoa/537-menu-button-style

Fixed menu button image in deployed version (#537)
fixed splitview container position #666
Merge pull request #718 from dinhviethoa/666-fix-ui-layout

Fixed splitview container position
Remove explicit memory setting for running dartScript
Merge pull request #721 from sunglim/remove_ex_mem

Remove explicit memory setting for running dartScript
Addressed comments.
Merge pull request #714 from dart-lang/clone_dialog

Clone dialog
Remove @host and other legacy CSS no longer used

Note about Dartium: Dartium by default doesn't support the newer rules; to turn on the support, the "Experimental Web Platform features" flag has to be turned on in chrome://flags.
Merge pull request #722 from ussuri/remove-legacy-css-rules

Remove @host and other legacy CSS no longer used