Bug 59045 no more support to reuse editors
The old search provided the option Window>Preferences>Workbench>Search>"Reuse Editors to Show Matches". This option is no longer honored by the new search implementation. This is a loss of function and we have to revive this option.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/JavaSearchResultPage.java
if (isFiltered(matches[i]))
				matches[i]= null;
			else 
				count++;
		}
		Match[] filteredMatches= new Match[count];
		
		int writeIndex= 0;
		for (int i= 0; i < matches.length; i++) {
			if (matches[i] != null)
				filteredMatches[writeIndex++]= matches[i];
		}
		
		return filteredMatches;
	}
	
	private boolean isFiltered(Match match) {
		MatchFilter[] filters= getMatchFilters();
		for (int j= 0; j < filters.length; j++) {
			if (filters[j].filters((JavaElementMatch) match))
				return true;
		}
		return false;
	}
	public void setInput(ISearchResult search, Object viewState) {
		updateFilterEnablement((JavaSearchResult)search);
		super.setInput(search, viewState);
	}
	private void updateFilterEnablement(JavaSearchResult result) {
		for (int i= 0; i < fFilterActions.length; i++) {