fixed display name of apps

jsonserver/static_db.json

   "app_config": [{
     "name": "PageHtml",
     "label": {
-      "fr": "Page Html",
-      "en": "Html page"
+      "fr": "Document",
+      "en": "Document"
     },
     "componentLeft": "PageHtml",
     "componentRight": "Timeline",
   }, {
     "name": "PageMarkdown",
     "label": {
-      "fr": "Page Markdown",
-      "en": "Markdown page"
+      "fr": "Document markdown",
+      "en": "Markdown document"
     },
     "componentLeft": "PageMarkdown",
     "componentRight": "undefined",

src/container/Dashboard.jsx

                         </ul>
                       </div>
                       <div className='dashboard__memberlist__form__submitbtn'>
-                        <button type='submit' className='btn btn-outline-primary'>Valider</button>
+                        <button className='btn btn-outline-primary'>Valider</button>
                       </div>
                     </form>
                   }