Explain personal note add button with tooltip

aleksis/apps/alsijil/static/js/vue/components/alsijil/PersonalNotes.js

@@ -175,19 +175,24 @@ export default {
             </v-chip>
           </template>
         </div>
-        <v-btn
-          class="ma-1"
-          color="primary"
-          icon
-          outlined
-          v-bind="attrs"
-          v-on="on"
-          @click="createPersonalNote"
-        >
-          <v-icon>
-            mdi-plus
-          </v-icon>
-        </v-btn>
+        <v-tooltip bottom>
+          <template v-slot:activator="{ on, attrs }">
+            <v-btn
+              class="ma-1"
+              color="primary"
+              icon
+              outlined
+              v-bind="attrs"
+              v-on="on"
+              @click="createPersonalNote"
+            >
+              <v-icon>
+                mdi-plus
+              </v-icon>
+            </v-btn>
+          </template>
+          <span v-text="$root.django.gettext('Add personal note')"></span>
+        </v-tooltip>
       </template>
       <v-card>
         <v-card-title>