setting tab: autofocus on the input field (#862)

diff --git a/src/components/view/SettingsTab.vue b/src/components/view/SettingsTab.vue
index 3f1901b..89bff17 100644
--- a/src/components/view/SettingsTab.vue
+++ b/src/components/view/SettingsTab.vue
@@ -15,6 +15,7 @@
 
         <div class="item__content">
           <a-input
+            :autoFocus="editableValueKey === index"
             v-if="editableValueKey === index"
             class="editable-value value"
             :defaultValue="item.value"