switched admin theme to GIN (plus custom module for terme_reference_tree display)

config/sync/core.extension.yml

@@ -95,6 +95,7 @@ module:
   gdpr_fields: 0
   gdpr_tasks: 0
   genpass: 0
+  gin_toolbar: 0
   graphql: 0
   help: 0
   honeypot: 0
@@ -126,6 +127,7 @@ module:
   mailjet_event: 0
   maillog: 0
   masquerade: 0
+  materio_admin: 0
   materio_commerce: 0
   materio_decoupled: 0
   materio_expo: 0
@@ -239,8 +241,7 @@ module:
 theme:
   stable: 0
   classy: 0
-  seven: 0
-  adminimal_theme: 0
-  matminimal: 0
   materiotheme: 0
+  claro: 0
+  gin: 0
 profile: figli_starter_kit