labelFormData.left = new FormAttachment(0, leftMargin - 3);
labelFormData.right = new FormAttachment(100, -rightMargin);
labelFormData.top = new FormAttachment(_documentationText, 5);
previewLabel.setLayoutData(labelFormData);
_browser = new Browser(composite, SWT.NONE);
FormData browserFormData = new FormData();
browserFormData.left = new FormAttachment(0, leftMargin);
browserFormData.right = new FormAttachment(100, -rightMargin);
browserFormData.top = new FormAttachment(previewLabel, -3);
browserFormData.bottom = new FormAttachment(100, -5);