internal: Further unsafe state improvements (#3404)

Instead of allowing Hyprland to sit in a state where there are no monitors, which various parts of the code don't like, we create a fake headless output on all monitor disconnect, and then remove it when a monitor appears

src/config/ConfigManager.cpp

@@ -2020,9 +2020,6 @@ void CConfigManager::performMonitorReload() {
     if (overAgain)
         performMonitorReload();
 
-    if (!g_pCompositor->m_vMonitors.empty()) // reset unsafe state if we have monitors
-        g_pCompositor->m_bUnsafeState = false;
-
     m_bWantsMonitorReload = false;
 
     EMIT_HOOK_EVENT("monitorLayoutChanged", nullptr);