Added title to back-to-top button (#2631)

* Add title to to-top button

* Rename

material/base.html

@@ -180,7 +180,7 @@
           </div>
         </div>
         {% if "navigation.top" in features %}
-          <a href="#" class="md-top md-icon" data-md-component="top" data-md-state="hidden">
+          <a href="#" class="md-top md-icon" title="{{ lang.t('top.title') }}" data-md-component="top" data-md-state="hidden">
             {% include ".icons/material/arrow-up.svg" %}
           </a>
         {% endif %}

material/partials/languages/en.html

@@ -33,5 +33,6 @@
   "source.file.date.updated": "Last update",
   "source.file.date.created": "Created",
   "tabs.title": "Tabs",
-  "toc.title": "Table of contents"
+  "toc.title": "Table of contents",
+  "top.title": "Back to top"
 }[key] }}{% endmacro %}

src/base.html

@@ -341,6 +341,7 @@
           <a
             href="#"
             class="md-top md-icon"
+            title="{{ lang.t('top.title') }}"
             data-md-component="top"
             data-md-state="hidden"
           >

src/partials/languages/en.html

@@ -53,5 +53,6 @@
   "source.file.date.updated": "Last update",
   "source.file.date.created": "Created",
   "tabs.title": "Tabs",
-  "toc.title": "Table of contents"
+  "toc.title": "Table of contents",
+  "top.title": "Back to top"
 }[key] }}{% endmacro %}