add null check for title and navTtitle in WizardletSection (#4161)
add null check for title and navTtitle in WizardletSection (#4161)

* add null check for title and navTtitle in WizardletSection

* updated to "return section && section.title;"

* fix typo
jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2,jacksonic/vjlofvhjfgm,foam-framework/foam2,jacksonic/vjlofvhjfgm,foam-framework/foam2,foam-framework/foam2