add version in settings page, modify version style

src/views/mobile/About.vue

@@ -121,7 +121,7 @@
 export default {
     computed: {
         version() {
-            return this.$version();
+            return 'v' + this.$version();
         }
     }
 }

src/views/mobile/Login.vue

@@ -110,7 +110,7 @@ export default {
     },
     computed: {
         version() {
-            return this.$version();
+            return 'v' + this.$version();
         },
         isUserRegistrationEnabled() {
             return this.$isUserRegistrationEnabled();

src/views/mobile/Settings.vue

@@ -19,7 +19,7 @@
                             :value="locale">{{ lang.displayName }}</option>
                 </select>
             </f7-list-item>
-            <f7-list-item :title="$t('About')" link="/about"></f7-list-item>
+            <f7-list-item :title="$t('About')" link="/about" :after="version"></f7-list-item>
         </f7-list>
     </f7-page>
 </template>
@@ -34,6 +34,9 @@ export default {
         };
     },
     computed: {
+        version() {
+            return 'v' + this.$version();
+        },
         userNickName() {
             return this.$user.getUserNickName() || this.$user.getUserName() || this.$t('User');
         },