Fix #1476 by updating the search interface

- Removed "Everything" choice for search, default to "Events"
- Add radio button for search type selection (events, activities, groups)
- Label now have a cursor pointer
- Remove the confusing concept of EVENTS, SHORTEVENTS and LONGEVENTS. There is only EVENTS and LONGEVENTS.

src/components/NavBar.vue

@@ -186,18 +186,7 @@
             v-model:location="location"
           />
 
-          <li class="m-auto" v-if="islongEvents">
-            <router-link
-              :to="{
-                ...$route,
-                name: RouteName.SEARCH,
-                query: { ...$route.query, contentType: 'SHORTEVENTS' },
-              }"
-              class="block py-2 pr-4 pl-3 text-zinc-700 border-b border-gray-100 hover:bg-zinc-50 md:hover:bg-transparent md:border-0 md:hover:text-mbz-purple-700 md:p-0 dark:text-zinc-400 md:dark:hover:text-white dark:hover:bg-zinc-700 dark:hover:text-white md:dark:hover:bg-transparent dark:border-gray-700"
-              >{{ t("Events") }}</router-link
-            >
-          </li>
-          <li class="m-auto" v-else>
+          <li class="m-auto">
             <router-link
               :to="{
                 ...$route,