Fix navbar alignment and sidebar scrollbar (#12571)

Author: cbrnr

doc/_static/style.css

@@ -353,3 +353,11 @@ div.sphx-glr-animation video {
     max-width: 100%;
     height: auto;
 }
+
+/* fix sidebar scrollbars */
+.sidebar-primary-items__end {
+    margin-bottom: 0 !important;
+    margin-top: 0 !important;
+    margin-left: 0 !important;
+    margin-right: 0 !important;
+}

doc/conf.py

@@ -757,6 +757,7 @@ def append_attr_meth_examples(app, what, name, obj, options, lines):
         "version-switcher",
         "navbar-icon-links",
     ],
+    "navbar_align": "left",
     "navbar_persistent": ["search-button"],
     "footer_start": ["copyright"],
     "secondary_sidebar_items": ["page-toc", "edit-this-page"],