fix problem clicking on offer-delivery, plus some other hardening and phrasing

src/db/databaseUtil.ts

@@ -107,7 +107,6 @@ export async function retrieveSettingsForActiveAccount(): Promise<Settings> {
   try {
     // Get default settings first
     const defaultSettings = await retrieveSettingsForDefaultAccount();
-
     // If no active DID, return defaults
     if (!defaultSettings.activeDid) {
       logConsoleAndDb(
@@ -280,10 +279,8 @@ export function generateUpdateStatement(
   const params: unknown[] = [];
 
   Object.entries(model).forEach(([key, value]) => {
-    if (value !== undefined) {
-      setClauses.push(`${key} = ?`);
-      params.push(value);
-    }
+    setClauses.push(`${key} = ?`);
+    params.push(value ?? null);
   });
 
   if (setClauses.length === 0) {