Bug 295981 [Forms] FormImages & FormFonts are not disposed correctly
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/FormText.java
notifySelectionChanged();
	}
	private void computeSelection() {
		GC gc = new GC(this);
		Paragraph[] paragraphs = model.getParagraphs();
		IHyperlinkSegment selectedLink = getSelectedLink();
		if (getDisplay().getFocusControl() != this)
			selectedLink = null;
		for (int i = 0; i < paragraphs.length; i++) {
			Paragraph p = paragraphs[i];
			if (i > 0)
				selData.markNewLine();
			p.computeSelection(gc, resourceTable, selectedLink, selData);
		}
		gc.dispose();
	}
	void clearSelection() {
		selData = null;
		if (!isDisposed()) {
			redraw();
			notifySelectionChanged();
		}
	}
	private void notifySelectionChanged() {
		Event event = new Event();
		event.widget = this;
		event.display = this.getDisplay();
		event.type = SWT.Selection;
		notifyListeners(SWT.Selection, event);