Bug 82743 [Markers] improved problem filter needed (OR clauses)
when working with large workspaces I find the current problems filter not powerful enough. If I were able to AND and OR the conditions available from the UI then I would solve all my use cases. my most needed one is : I would like to see ERRORS anywhere in the workspace OR WARNINGS in the current selected project
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerList.java
private int[] markerCounts = null;
    private ConcreteMarker[] markers;
    /**
     * Lazily created marker table - maps IMarkers onto ConcreteMarkers.
     * Null if not created
     */
    private Map markerTable;
    /**
     * Creates an initially empty marker list
     */
    public MarkerList() {
        this(new ConcreteMarker[0]);
    }
    public MarkerList(Collection markers) {
        this((ConcreteMarker[]) markers.toArray(new ConcreteMarker[markers
                .size()]));
    }
    /**
     * Creates a list containing the given set of markers
     *