Bug 58921 Texts created with unsupported styles
- org.eclipse.jdt.internal.ui.text.AbstractInformationControl.createFilterText creates a Text with style SWT.FLAT - org.eclipse.jdt.internal.ui.filters.CustomFiltersDialog.createCheckBoxList creates a Text with style SWT.VERTICAL (perhaps V_SCROLL was meant?)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/AbstractInformationControl.java
int border= ((shellStyle & SWT.NO_TRIM) == 0) ? 0 : BORDER;
		fShell.setLayout(new BorderFillLayout(border));
		
		if (hasHeader()) {
			fComposite.setTabList(new Control[] {fFilterText, fTreeViewer.getTree()});
		} else {
			fViewMenuButtonComposite.setTabList(new Control[] {fFilterText});
			fComposite.setTabList(new Control[] {fViewMenuButtonComposite, fTreeViewer.getTree()});
		}
		
		setInfoSystemColor();
		installFilter();
		
		addDisposeListener(this);
		fDeactivateListener= new Listener() {
			/*
			 * @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
			 */
			public void handleEvent(Event event) {
				if (fIsDecativateListenerActive)
					dispose();
			}
		};
		fShell.addListener(SWT.Deactivate, fDeactivateListener);
		fIsDecativateListenerActive= true;
		fShell.addShellListener(new ShellAdapter() {
			/*
			 * @see org.eclipse.swt.events.ShellAdapter#shellActivated(org.eclipse.swt.events.ShellEvent)
			 */
			public void shellActivated(ShellEvent e) {