D4310 new input section (#447)

* fix password reset bug

* bottom margin

* fix implicit custom validation, field margin

* fix custom validation error condition

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Co-authored-by: Julien Nahum <julien@nahum.net>

client/components/open/forms/components/CustomFieldValidation.vue

@@ -68,7 +68,7 @@ export default {
         "field.id": {
             handler() {
                 // On field change, reset validation
-                this.validation = this.field.validation.error_conditions || {
+                this.validation = this.field?.validation?.error_conditions || {
                     conditions: null,
                     actions: [],
                 }