Added projectRefresh event when project tree is refreshed but project root has not changed.
Added projectRefresh event doc.
Made selection highlight slightly darker.
Merge pull request #4815 from zaggino/projectRefreshEvent

Added projectRefresh event when project tree is refreshed but project root has not changed.
Tweaked comment for projectRefresh
Merge pull request #5032 from adobe/larz/selection-highlight-tweak

Made selection highlight slightly darker.