UI tweaks (#23492)

* slightly darken bg-card

* change menu label

* move snapshot retain out of advanced fields

* add new ui options for collapsibles

* backend title and description

* remove unused snapshot retention field

* update reference config

* remove further references to snapshots retain.mode

web/src/components/config-form/section-configs/snapshots.ts

@@ -21,13 +21,14 @@ const snapshots: SectionConfigOverrides = {
       "crop",
       "quality",
       "timestamp",
+      "required_zones",
       "retain",
     ],
     fieldGroups: {
       display: ["bounding_box", "crop", "quality", "timestamp"],
     },
     hiddenFields: ["enabled_in_config"],
-    advancedFields: ["height", "quality", "retain"],
+    advancedFields: ["height", "quality"],
     uiSchema: {
       required_zones: {
         "ui:widget": "zoneNames",
@@ -35,11 +36,6 @@ const snapshots: SectionConfigOverrides = {
           suppressMultiSchema: true,
         },
       },
-      "retain.mode": {
-        "ui:options": {
-          enumI18nPrefix: "retainMode",
-        },
-      },
     },
   },
   global: {