Update translations

client/src/locale/en_US/LC_MESSAGES/app.po

@@ -42,6 +42,10 @@ msgstr "A search engine of <a href=\"https://joinpeertube.org\" target=\"_blank\
 msgid "Activism"
 msgstr "Activism"
 
+#: src/views/Search.vue
+msgid "Add tag"
+msgstr "Add tag"
+
 #: src/views/Search.vue:143
 msgid "All of these tags"
 msgstr "All of these tags"

client/src/locale/fr_FR/LC_MESSAGES/app.po

@@ -57,6 +57,10 @@ msgstr ""
 msgid "Activism"
 msgstr "Militantisme"
 
+#: src/views/Search.vue
+msgid "Add tag"
+msgstr ""
+
 #: src/views/Search.vue:143
 msgid "All of these tags"
 msgstr "Tous les mots clés suivants"

client/src/views/Search.vue

@@ -146,7 +146,7 @@
                 Reset
               </button>
 
-              <vue-tags-input @tags-changed="newTags => formTagsAllOf = newTags" v-model="formTagAllOf" :tags="formTagsAllOf" />
+              <vue-tags-input v-bind:placeholder="tagsPlaceholder" @tags-changed="newTags => formTagsAllOf = newTags" v-model="formTagAllOf" :tags="formTagsAllOf" />
             </div>
 
             <div class="form-group">
@@ -155,7 +155,7 @@
                 Reset
               </button>
 
-              <vue-tags-input @tags-changed="newTags => formTagsOneOf = newTags" v-model="formTagOneOf" :tags="formTagsOneOf" />
+              <vue-tags-input v-bind:placeholder="tagsPlaceholder" @tags-changed="newTags => formTagsOneOf = newTags" v-model="formTagOneOf" :tags="formTagsOneOf" />
             </div>
 
             <div class="button-block">
@@ -527,6 +527,10 @@
         return this.$gettext('Keyword, channel, video, etc.')
       },
 
+      tagsPlaceholder () {
+        return this.$gettext('Add tag')
+      },
+
       publishedDateRanges () {
         return  [
           {