nav: collapse some categories on the sidebar

Having all categories open by default takes up considerable amounts of
vertical screen-space, so collapse some less "important" ones.

Signed-off-by: Luca Zeuch <[email protected]>

Author: l-zeuch

content/docs/core/_index.md

@@ -1,4 +1,6 @@
 +++
 title = "Core"
 weight = 200
+[sidebar]
+    collapsed = true
 +++

content/docs/custom-commands/_index.md

@@ -1,4 +1,6 @@
 +++
 title = "Custom Commands"
 weight = 300
+[sidebar]
+    collapsed = true
 +++

content/docs/fun/_index.md

@@ -1,4 +1,6 @@
 +++
 title = "Fun"
 weight = 800
+[sidebar]
+    collapsed = true
 +++

content/docs/notifications/_index.md

@@ -1,4 +1,6 @@
 +++
 title = 'Notifications and Feeds'
 weight = 500
+[sidebar]
+    collapsed = true
 +++