Add site title partial

Why these changes are being introduced:

The GeoData visual design includes a heading at the top of each
page, along with some descriptive text.

Relevant ticket(s):

https://mitlibraries.atlassian.net/browse/GDT-182

How this addresses that need:

This adds the requested element as a partial, with conditional
copy for GDT versus non-GDT applications. It also moves the label text
to the `title` attribute, as the label is is now visually redundant but
may still be useful to screen reader users.

Side effects of this change:

* The input label before form submit is now the same as the placeholder
text. This feels fine since screen readers might not read placeholder
text, but they do consistently rely on labels.
* The copy for non-GDT titles did not come from UXWS and is subject
to change.

app/assets/stylesheets/partials/_search.scss

@@ -6,7 +6,7 @@
 .basic-search {
   background-color: #989898;
   margin-bottom: 0rem;
-  padding: 1.6rem 2rem;
+  padding: 2.4rem 2rem 1rem 2.4rem;
 
   details {
     margin-top: 1rem;

app/views/basic_search/index.html.erb

@@ -1,6 +1,7 @@
 <%= content_for(:title, "Search | MIT Libraries") %>
 
 <div class="space-wrap">
+  <%= render partial: "shared/site_title" %>
   <%= render partial: "search/form" %>
   <%= render partial: "static/about" if ENV.fetch('ABOUT_APP', nil) %>
 </div>

app/views/record/view.html.erb

@@ -2,6 +2,7 @@
 
 <%= render(partial: 'shared/error', collection: @errors) %>
 
+<%= render(partial: 'shared/site_title') %>
 <%= render(partial: 'search/form')%>
 
 <% if @record.nil? %>

app/views/search/_form.html.erb

@@ -19,7 +19,7 @@ end
 
 <form id="basic-search" class="form-horizontal basic-search" action="<%= results_path %>" method="get">
   <div class="form-group">
-    <label for="basic-search-main" class="field-label"><%= label %></label>
+    <label for="basic-search-main" class="field-label" title="<%= label %>" />
     <input id="basic-search-main" type="search" class="field field-text basic-search-input <%= "required" if search_required %>" name="q" placeholder="Enter your search" value="<%= params[:q] %>" <%= 'required="required" aria-required="true"' if search_required %>>
     <div class="basic-search-submit">
       <button type="submit" class="btn button-primary">Search</button>

app/views/search/results.html.erb

@@ -1,6 +1,8 @@
 <%= content_for(:title, "Search Results | MIT Libraries") %>
 
 <div class="space-wrap">
+
+  <%= render partial: "shared/site_title" %>
   <%= render partial: "form" %>
   <%= render partial: "search_summary" %>
 

app/views/shared/_site_title.html.erb

@@ -0,0 +1,6 @@
+<% if Flipflop.enabled?(:gdt) %>
+  <h1 class="hd-2">Search for Geographic/GIS data</h1>
+  <p>Find GIS data held at MIT and other universities</p>
+<% else %>
+  <h1>Search the MIT Libraries</h1>
+<% end %>

app/views/static/_forms.html.erb

@@ -1,5 +1,5 @@
 <%
-  label = "Search the MIT Libraries"
+  label = "Enter your search"
   button = "Search"
 %>
 <form id="basic-search" class="form-horizontal basic-search" action="/results" method="get">