Made ALL of opencase_defaults config optional.

The idea is you can install it, and use as a basis to configure your own things and then if you uninstall it it shouldn't lose your stuff.

modules/opencase_entities/src/Entity/OCActivity.php

@@ -278,7 +278,7 @@ class OCActivity extends RevisionableContentEntityBase implements OCActivityInte
       ])
       ->setRequired(FALSE);
 
-    $fields['time_taken'] = BaseFieldDefinition::create('integer')
+    $fields['time_taken'] = BaseFieldDefinition::create('decimal')
       ->setLabel(t('Time taken'))
       ->setRevisionable(TRUE)
       ->setSettings([
@@ -287,11 +287,11 @@ class OCActivity extends RevisionableContentEntityBase implements OCActivityInte
       ->setDefaultValue('')
       ->setDisplayOptions('view', [
         'label' => 'above',
-        'type' => 'number_unformatted',
+        'type' => 'number_decimal',
         'weight' => -3,
       ])
       ->setDisplayOptions('form', [
-        'type' => 'number_unformatted',
+        'type' => 'number_decimal',
         'weight' => -3,
       ]);