UPD: more consistency

frontend/src/views/netdb/Tokens.vue

 <template>
   <div id="Tokens">
     <h1 class="my-4">Unterkonten & API-Tokens</h1>
-    <b-modal id="modal-create-account" size="lg" title="Subaccount erstellen"
+    <b-modal id="modal-create-account" size="lg" title="Unterkonto erstellen"
              @hidden="resetAccountData">
       <b-form @submit="createAccount">
         <b-form-group label="Beschreibung:" label-for="input-account-create-description">