Fixes and tidies

schema/ContactCategory.entityType.php

@@ -27,13 +27,6 @@ return [
       'description' => E::ts('Unique ID, corresponds to contact id'),
       'primary_key' => TRUE,
       'auto_increment' => TRUE,
-    ],
-    'contact_id' => [
-      'title' => E::ts('Contact ID'),
-      'sql_type' => 'int unsigned',
-      'input_type' => 'EntityRef',
-      'required' => TRUE,
-      'description' => E::ts('Same as id but for FormBuilder'),
       'input_attrs' => [
         'label' => E::ts('Contact'),
       ],
@@ -64,7 +57,7 @@ return [
       ],
     ],
     'next_category' => [
-      'title' => E::ts('Next Category'),
+      'title' => E::ts('Next Category - internal use'),
       'sql_type' => 'int unsigned',
       'required' => TRUE,
       'default' => 0,

schema/ContactCategoryDefinition.entityType.php

@@ -66,7 +66,7 @@ return [
     'icon' => [
       'title' => E::ts('Icon'),
       'sql_type' => 'varchar(64)',
-      'default' => '',
+      'default' => 'fa-circle-half-stroke',
       'required' => TRUE,
       'description' => E::ts('The name of a Font Awesome icon to use to represent this, e.g. fa-trophy'),
     ],