Fix/config obj list (#1351)

* remove deprecated build check

* fixed config types for object and union; cleaned up mock api fixtures

* make form object element transition times consistent and emit expand event on list object items

frontend/projects/ui/src/app/pages/server-routes/marketplaces/marketplaces.page.ts

@@ -298,7 +298,6 @@ function getMarketplaceValueSpec(): ValueSpecObject {
   return {
     type: 'object',
     name: 'Add Marketplace',
-    'unique-by': null,
     spec: {
       url: {
         type: 'string',

frontend/projects/ui/src/app/pages/server-routes/wifi/wifi.page.ts

@@ -212,7 +212,7 @@ export class WifiPage {
         } else {
           attempts++
           const diff = end - start
-          // depending on the response time, wait a min of 1000 ms, and a max of 4000 ms in between retries.  Both 1000 and 4000 are arbitrary      
+          // depending on the response time, wait a min of 1000 ms, and a max of 4000 ms in between retries.  Both 1000 and 4000 are arbitrary
           await pauseFor(Math.max(1000, 4000 - diff))
         }
       } catch (e) {
@@ -354,7 +354,6 @@ function getWifiValueSpec(
     name: 'WiFi Credentials',
     description:
       'Enter the network SSID and password. You can connect now or save the network for later.',
-    'unique-by': null,
     spec: {
       ssid: {
         type: 'string',