Bug 202474 [Forms] Create a resource manager to share the bold font
If a FormToolkit is passed into FormEditor it is disposed upon disposal of the editor even though it may be shared.
bundles/org.eclipse.ui.forms/src/org/eclipse/ui/forms/widgets/FormText.java
*            the text to render
	 * @param parseTags
	 *            if <samp>true </samp>, formatting tags will be parsed.
	 *            Otherwise, text will be rendered as-is.
	 * @param expandURLs
	 *            if <samp>true </samp>, URLs found in the untagged text will be
	 *            converted into hyperlinks.
	 */
	public void setText(String text, boolean parseTags, boolean expandURLs) {
		disposeResourceTable(false);
		entered = null;
		if (parseTags)
			model.parseTaggedText(text, expandURLs);
		else
			model.parseRegularText(text, expandURLs);
		hookControlSegmentFocus();
		layout();
		redraw();
	}
	/**
	 * Sets the contents of the stream. Optionally, URLs in untagged text can be
	 * converted into hyperlinks. The caller is responsible for closing the
	 * stream.
	 * 
	 * @param is
	 *            stream to render
	 * @param expandURLs
	 *            if <samp>true </samp>, URLs found in untagged text will be
	 *            converted into hyperlinks.
	 */