Bug 18637 Templates preferences: table layout problem
In Preferences>Java>Templates the table comes up with an incorrect initial layout (columns are not wide enough around 100 pixels). workaround adjust manually fix candidate for F3
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/preferences/TemplatePreferencePage.java
Template[] templates= fTemplates.getTemplates();
		
		List list= new ArrayList(templates.length);
		
		for (int i= 0; i != templates.length; i++)
			if (templates[i].isEnabled())
				list.add(templates[i]);
				
		return (Template[]) list.toArray(new Template[list.size()]);
	}
	
	private SourceViewer createViewer(Composite parent) {
		Label label= new Label(parent, SWT.NONE);
		label.setText(TemplateMessages.getString("TemplatePreferencePage.preview")); 
		GridData data= new GridData();
		data.horizontalSpan= 2;
		label.setLayoutData(data);
		
		SourceViewer viewer= new SourceViewer(parent, null, SWT.BORDER | SWT.V_SCROLL | SWT.H_SCROLL);
		JavaTextTools tools= JavaPlugin.getDefault().getJavaTextTools();
		IDocument document= new Document();
		IDocumentPartitioner partitioner= tools.createDocumentPartitioner();
		document.setDocumentPartitioner(partitioner);
		partitioner.connect(document);		
		viewer.configure(new JavaSourceViewerConfiguration(tools, null));
		viewer.setEditable(false);
		viewer.setDocument(document);
		viewer.getTextWidget().setBackground(getShell().getDisplay().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
	
		Font font= JFaceResources.getFontRegistry().get(JFaceResources.TEXT_FONT);