xdg-shell: rename wlr_xdg_toplevel.added to sent_initial_configure

This is more descriptive, and avoids the confusion with
wlr_xdg_surface.added.

include/wlr/types/wlr_xdg_shell.h

@@ -172,7 +172,7 @@ struct wlr_xdg_toplevel_requested {
 struct wlr_xdg_toplevel {
 	struct wl_resource *resource;
 	struct wlr_xdg_surface *base;
-	bool added;
+	bool sent_initial_configure;
 
 	struct wlr_xdg_toplevel *parent;
 	struct wl_listener parent_unmap;

types/xdg_shell/wlr_xdg_toplevel.c

@@ -132,11 +132,11 @@ void handle_xdg_toplevel_committed(struct wlr_xdg_toplevel *toplevel) {
 
 	toplevel->current = toplevel->pending;
 
-	if (!toplevel->added) {
+	if (!toplevel->sent_initial_configure) {
 		// on the first commit, send a configure request to tell the client it
 		// is added
 		wlr_xdg_surface_schedule_configure(toplevel->base);
-		toplevel->added = true;
+		toplevel->sent_initial_configure = true;
 
 		if (toplevel->base->client->shell->version >=
 				XDG_TOPLEVEL_WM_CAPABILITIES_SINCE_VERSION) {
@@ -535,7 +535,7 @@ void unmap_xdg_toplevel(struct wlr_xdg_toplevel *toplevel) {
 	toplevel->requested.maximized = false;
 	toplevel->requested.minimized = false;
 
-	toplevel->added = false;
+	toplevel->sent_initial_configure = false;
 }
 
 void destroy_xdg_toplevel(struct wlr_xdg_toplevel *toplevel) {