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/MarkerFilter.java
* @param element resource to test for enclosure by a working set
     * 	element 
     * @return true if element is enclosed by a working set element and 
     * 	false otherwise. 
     */
    private boolean isEnclosed(IResource element) {
        if (workingSet == null) {
            return false;
        }
        Set workingSetPaths = getWorkingSetAsSetOfPaths();
        return workingSetPaths.contains(element.getFullPath().toString());
    }
    /**
     * @return the defined limit on the number of markers to be displayed.
     */
    int getMarkerLimit() {
        return markerLimit;
    }
    /**
     * Sets the limit on the number of markers to be displayed.
     * 
     * @param the new limit
     */
    void setMarkerLimit(int markerLimit) {
        this.markerLimit = markerLimit;
    }
    /**
     * @return <ul>
     * <li><code>MarkerFilter.ON_ANY_RESOURCE</code> if showing items associated with any resource.</li>
     * <li><code>MarkerFilter.ON_SELECTED_RESOURCE_ONLY</code> if showing items associated with