restrict non super user admins actions

lnbits/extensions/admin/templates/admin/_tab_funding.html

@@ -21,6 +21,7 @@
             <div class="col-12">
               <p>Active Funding<small> (Requires server restart)</small></p>
               <q-select
+                :disable="!isSuperUser"
                 filled
                 v-model="formData.lnbits_backend_wallet_class"
                 hint="Select the active funding wallet"
@@ -56,6 +57,7 @@
           </div>
         </div>
       </div>
+      <div v-if="isSuperUser">
         <p class="q-my-md">
           Funding Sources<small> (Requires server restart)</small>
         </p>
@@ -88,5 +90,6 @@
           </q-expansion-item>
         </q-list>
       </div>
+    </div>
   </q-card-section>
 </q-tab-panel>