Merge branch 'feature/slides-bigger-code-boxes' into 'master'

[slides][css] use bigger code boxes

See merge request !165

slides/dumux_course.css

@@ -19,6 +19,14 @@
     font-size: var(--font-size);
 }
 
+.reveal pre {
+    width: 100%;
+}
+
+.reveal pre code {
+    max-height: 600px;
+}
+
 .reveal ul {
     font-size: var(--font-size);
 }