fix(sni): delay tray item insertion until proxies are ready

Only add tray widgets after the SNI proxy has finished initializing and the
item has a valid id/category pair.

This also removes invalid items through the host teardown path, refreshes the
tray when item status changes, and avoids calling DBus methods through a null
proxy during early clicks or scroll events.

Signed-off-by: Austin Horstman <khaneliman12@gmail.com>

src/modules/sni/tray.cpp

@@ -13,7 +13,8 @@ Tray::Tray(const std::string& id, const Bar& bar, const Json::Value& config)
       box_(bar.orientation, 0),
       watcher_(SNI::Watcher::getInstance()),
       host_(nb_hosts_, config, bar, std::bind(&Tray::onAdd, this, std::placeholders::_1),
-            std::bind(&Tray::onRemove, this, std::placeholders::_1)) {
+            std::bind(&Tray::onRemove, this, std::placeholders::_1),
+            std::bind(&Tray::queueUpdate, this)) {
   box_.set_name("tray");
   event_box_.add(box_);
   if (!id.empty()) {
@@ -33,6 +34,8 @@ Tray::Tray(const std::string& id, const Bar& bar, const Json::Value& config)
   dp.emit();
 }
 
+void Tray::queueUpdate() { dp.emit(); }
+
 void Tray::onAdd(std::unique_ptr<Item>& item) {
   if (config_["reverse-direction"].isBool() && config_["reverse-direction"].asBool()) {
     box_.pack_end(item->event_box);