Merge pull request matplotlib#29990 from meeseeksmachine/auto-backport-of-pr-29789-on-v3.10.x

Backport PR matplotlib#29789 on branch v3.10.x (Improve layout of cheatsheets in sidebar)

Author: dstansby

doc/_static/mpl.css

@@ -207,3 +207,15 @@ div.wide-table table th.stub {
 .section-toc.toctree-wrapper li>ul{
     padding-inline-start:0;
 }
+
+.sidebar-cheatsheets {
+    margin-bottom: 3em;
+}
+
+.sidebar-cheatsheets > h3 {
+    margin-top: 0;
+}
+
+.sidebar-cheatsheets > img {
+    width: 100%;
+}

doc/_templates/cheatsheet_sidebar.html

@@ -1,6 +1,6 @@
 
 <div class="sidebar-cheatsheets">
-  <h3>Matplotlib cheatsheets</h3>
+  <h3>Cheatsheets</h3>
   <a href="https://matplotlib.org/cheatsheets/">
     <img src="_static/mpl_cheatsheet1.png"
          alt="Matplotlib cheatsheets"