Apply minor UI update to PersonChooseModal.vue create button

- Added `btn btn-submit` CSS classes to the create button for improved styling.
- Removed outdated and commented-out `on-the-fly` implementation.

src/Bundle/ChillPersonBundle/Resources/public/vuejs/_components/AddPersons/PersonChooseModal.vue

@@ -72,24 +72,9 @@
             v-if="props.allowCreate && query.length > 0"
             class="create-button"
           >
-            <button type="button" @click="emit('onAskForCreate', { query })">
+            <button type="button" class="btn btn-submit" @click="emit('onAskForCreate', { query })">
               {{ trans(ONTHEFLY_CREATE_BUTTON, { q: query }) }}
             </button>
-            <!--
-            TODO remove this
-            <on-the-fly
-              v-if="
-                queryLength >= 3 &&
-                (options.type.includes('person') || options.type.includes('thirdparty'))
-              "
-              :button-text="trans(ONTHEFLY_CREATE_BUTTON, { q: query })"
-              :allowed-types="options.type"
-              :query="query"
-              action="create"
-              @save-form-on-the-fly="saveFormOnTheFly"
-              ref="onTheFly"
-            />
-            -->
           </div>
         </div>
       </template>