Bug 99140 [preferences] Syntax coloring preference page does not update preview
N20050609-0010 + JDT/Core & UI from HEAD Syntax coloring preference page does not update preview: - enable 'Auto(un)boxed expressions' -> changing one of the color or font settings does not update the preview - toggling 'Enable' updates the preview
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/SemanticHighlightingManager.java
if (fReconciler != null) {
			fReconciler.uninstall();
			fReconciler= null;
		}
		if (fPresenter != null) {
			fPresenter.uninstall();
			fPresenter= null;
		}
		if (fSemanticHighlightings != null)
			disposeHighlightings();
	}
	/**
	 * @return <code>true</code> iff semantic highlighting is enabled in the preferences
	 */
	private boolean isEnabled() {
		return SemanticHighlightings.isEnabled(fPreferenceStore);
	}
	/**
	 * Initialize semantic highlightings.
	 */
	private void initializeHighlightings() {
		fSemanticHighlightings= SemanticHighlightings.getSemanticHighlightings();
		fHighlightings= new Highlighting[fSemanticHighlightings.length];
		for (int i= 0, n= fSemanticHighlightings.length; i < n; i++) {
			SemanticHighlighting semanticHighlighting= fSemanticHighlightings[i];
			String colorKey= SemanticHighlightings.getColorPreferenceKey(semanticHighlighting);
			addColor(colorKey);
			String boldKey= SemanticHighlightings.getBoldPreferenceKey(semanticHighlighting);
			int style= fPreferenceStore.getBoolean(boldKey) ? SWT.BOLD : SWT.NORMAL;
			String italicKey= SemanticHighlightings.getItalicPreferenceKey(semanticHighlighting);