fix some deprication warnings

Author: jantje

io.sloeber.ui/src/io/sloeber/ui/Activator.java

@@ -5,6 +5,7 @@
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.Job;
 import org.eclipse.jface.resource.ImageDescriptor;
+import org.eclipse.jface.resource.ResourceLocator;
 import org.eclipse.ui.plugin.AbstractUIPlugin;
 import org.eclipse.ui.progress.UIJob;
 import org.eclipse.ui.statushandlers.StatusManager;
@@ -92,7 +93,7 @@ private static void initializeImportantVariables() {
 	 * @return the image descriptor
 	 */
 	public static ImageDescriptor getImageDescriptor(String path) {
-		return imageDescriptorFromPlugin(PLUGIN_ID, path);
+		return ResourceLocator.imageDescriptorFromBundle(PLUGIN_ID, path).orElse(null);
 	}
 
 	public static final short PLOTTER_START_DATA = (short) 0xCDAB;// This is the

io.sloeber.ui/src/io/sloeber/ui/preferences/LibrarySelectionPage.java

@@ -110,7 +110,7 @@ protected boolean isLeafMatch(final Viewer viewer1, final Object element) {
 			}
 		};
 
-		this.tree = new FilteredTree(parent, SWT.CHECK | SWT.V_SCROLL | SWT.BORDER | SWT.FULL_SELECTION, filter, true) {
+		this.tree = new FilteredTree(parent, SWT.CHECK | SWT.V_SCROLL | SWT.BORDER | SWT.FULL_SELECTION, filter, true,true) {
 			@SuppressWarnings("synthetic-access")
 			@Override
 			protected TreeViewer doCreateTreeViewer(Composite composite, int style) {

io.sloeber.ui/src/io/sloeber/ui/preferences/PlatformSelectionPage.java

@@ -137,7 +137,7 @@ private boolean myWordMatches(IndexFile indexFile) {
 		};
 
 		this.myGuiplatformTree = new FilteredTree(control, SWT.CHECK | SWT.V_SCROLL | SWT.BORDER | SWT.FULL_SELECTION,
-				filter, true) {
+				filter, true,true) {
 
 			@Override
 			protected TreeViewer doCreateTreeViewer(Composite composite, int style) {