save to disk when leaving thread view

0023-on.keychord_press

@@ -1,6 +1,7 @@
 on.keychord_press = function(chord, key)
 	print('key', chord)
 	if Global_state.thread and chord == 'C-o' then
+		quit_all_editors(Global_state.thread)
 		Global_state.thread = nil
 		reset_viewport()
 		A()

0137-quit_all_editors

@@ -0,0 +1,9 @@
+quit_all_editors = function(node)
+	if node.type == 'text' and not node.button then
+		edit.quit(node.editor)
+	elseif node.type == 'rows' or node.type == 'cols' then
+		for _,child in ipairs(node.data) do
+			quit_all_editors(child, dt)
+		end
+	end
+end

0138-on.quit

@@ -0,0 +1,5 @@
+on.quit = function()
+	if Global_state.thread then
+		quit_all_editors(Global_state.thread)
+	end
+end