[gnome-builder/wip/gtk4-port] plugins/todo: re-enable todo plugin

[Christian Hergert <chergert src gnome org>]

commit c79e1caa56574a0dc7225b3b034b9c5b9d0ef729
Author: Christian Hergert <chergert redhat com>
Date:   Wed Apr 6 11:12:10 2022 -0700

    plugins/todo: re-enable todo plugin
    
    This compiles now, but still places it's pane in the wrong position and
    that needs to be updated using IdePanelPosition.

 src/plugins/meson.build | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/plugins/meson.build b/src/plugins/meson.build
index 012ea8ff7..055d4a121 100644
--- a/src/plugins/meson.build
+++ b/src/plugins/meson.build
@@ -130,7 +130,7 @@ subdir('stylelint')
 #subdir('sysroot')
 #subdir('terminal')
 #subdir('testui')
-#subdir('todo')
+subdir('todo')
 #subdir('ts-language-server')
 subdir('trim-spaces')
 subdir('update-manager')