[keel,studio,turbine] Finish removing implicit String(const char*) calls

src/studio/applib/src/projecttreemodel.cpp

@@ -52,7 +52,7 @@ ox::BasicString<255> ProjectTreeModel::fullPath() const noexcept {
 	if (m_parent) {
 		return m_parent->fullPath() + "/" + ox::StringView(m_name);
 	}
-	return "";
+	return {};
 }
 
 }