Implement scratchpad

Implements the following commands:

* move scratchpad
* scratchpad show
* [criteria] scratchpad show

Also fixes these:

* Fix memory leak when executing command with criteria
(use `list_free(views)` instead of `free(views)`)
* Fix crash when running `move to` with no further arguments

1 files changed, 2 insertions, 0 deletions

diff --git a/include/sway/server.h b/include/sway/server.h
index 70bde6d4..6cef2e58 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -48,6 +48,8 @@ struct sway_server {
 
 	list_t *transactions;
 	list_t *dirty_containers;
+
+	list_t *scratchpad; // struct sway_container
 };
 
 struct sway_server server;