Fixed mobile search bar and network ui bug

apps/block_scout_web/lib/block_scout_web/templates/layout/_topnav.html.eex

@@ -65,7 +65,7 @@
           <% end %>
         </li>
       </ul>
-      <div class="search-form">
+      <div class="search-form d-lg-flex d-inline-block">
         <%= form_for @conn, chain_path(@conn, :search), [class: "form-inline my-2 my-lg-0", method: :get, enforce_utf8: false], fn f -> %>
           <div class="input-group">
             <%= search_input f, :q, class: 'form-control mr-auto', placeholder: gettext("Search by address, transaction hash, or block number"), "aria-describedby": "search-icon", "aria-label": gettext("Search"), "data-test": "search_input" %>
@@ -79,7 +79,7 @@
         <% end %>
         <ul class="navbar-nav">
           <li class="nav-item dropdown">
-            <a class="nav-link dropdown-toggle pl-2" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
+            <a class="nav-link dropdown-toggle pl-lg-2" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
               <!-- ICON FOR MAINNET -->
               <span class="nav-link-icon">
                 <%= render BlockScoutWeb.IconsView, network_icon_partial() %>