Bug 204935 [Markers] MarkersView should use fixed default widths
The MarkersView should use fixed rather than proportional widths as columns are getting very small when the workbench is restarted with a small markers view.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/api/MarkerField.java
Object filter = IDEWorkbenchPlugin.createExtension(
					configurationElement, ATTRIBUTE_FILTER_CLASS);
			if (filter == null)
				return null;
			MarkerFieldFilter fieldFilter = (MarkerFieldFilter) filter;
			fieldFilter.setField(this);
			return fieldFilter;
		} catch (CoreException e) {
			StatusManager.getManager().handle(e.getStatus());
			return null;
		}
	}
	/**
	 * Create a FilterConfigurationArea for the receiver.
	 * 
	 * @return FilterConfigurationArea or <code>null</code>
	 */
	public FilterConfigurationArea generateFilterArea() {
		try {
			if (configurationElement
					.getAttribute(ATTRIBUTE_FILTER_CONFIGURATION_CLASS) == null)
				return null;
			FilterConfigurationArea area = (FilterConfigurationArea) IDEWorkbenchPlugin
					.createExtension(configurationElement,
							ATTRIBUTE_FILTER_CONFIGURATION_CLASS);
			if (area != null)
				area.setField(this);
			return area;
		} catch (CoreException e) {
			StatusManager.getManager().handle(e.getStatus());