Add placeholders to v-select in custom fieldtypes (#143)

Co-authored-by: Laurens Kuiper <l@urens.me>

Author: lwekuiper

resources/js/components/fieldtypes/FormFieldsFieldtype.vue

@@ -9,6 +9,7 @@
             :clearable="true"
             :options="fields"
             :reduce="(option) => option.id"
+            :placeholder="__('Choose...')"
             :searchable="true"
             @input="$emit('input', $event)"
         />

resources/js/components/fieldtypes/MailchimpMergeFieldsFieldtype.vue

@@ -9,6 +9,7 @@
             :clearable="true"
             :options="fields"
             :reduce="(option) => option.id"
+            :placeholder="__('Choose...')"
             :searchable="true"
             @input="$emit('input', $event)"
         />

resources/js/components/fieldtypes/MailchimpTagFieldtype.vue

@@ -9,6 +9,7 @@
             :clearable="true"
             :options="tags"
             :reduce="(option) => option.id"
+            :placeholder="__('Choose...')"
             :searchable="true"
             @input="$emit('input', $event)"
         />

resources/js/components/fieldtypes/UserFieldsFieldtype.vue

@@ -6,6 +6,7 @@
             :clearable="true"
             :options="fields"
             :reduce="(option) => option.id"
+            :placeholder="__('Choose...')"
             :searchable="true"
             @input="$emit('input', $event)"
         />