task list will be using the new indexing api and it needs some way to restart the indexing process when some of its
settings have changed - for example when a new task provider has been registered or removed.
There is a new IndexingManager.refreshAllIndicies(String indexerName) method.
Integrated into 'main-golden', will be available in build *200903281400* on http://bits.netbeans.org/dev/nightly/ (upload may still be in progress)
User: Vita Stejskal <firstname.lastname@example.org>
Log: #158203: adding support for refreshing indicies created by one CustomIndexer