more FA5 stuff with small related refactoring

src/components/scope_selector/scope_selector.js

@@ -2,7 +2,7 @@ import { library } from '@fortawesome/fontawesome-svg-core'
 import {
   faEnvelope,
   faLock,
-  faLockOpen,
+  faUnlock,
   faGlobeEurope
 } from '@fortawesome/free-solid-svg-icons'
 
@@ -10,7 +10,7 @@ library.add(
   faEnvelope,
   faGlobeEurope,
   faLock,
-  faLockOpen
+  faUnlock
 )
 
 const ScopeSelector = {

src/components/scope_selector/scope_selector.vue

@@ -28,7 +28,7 @@
       :title="$t('post_status.scope.unlisted')"
       @click="changeVis('unlisted')"
       >
-      <FAIcon icon="lock-open" class="button-icon" size="lg" />
+      <FAIcon icon="unlock" class="button-icon" size="lg" />
     </span>
     <span
       v-if="showPublic"