Debugger/CDB: Fix stack view when attaching to crashed app.
The timer for event-delivery time-out checking when attaching to a crashed process in the case of not being spawned by the handler (such as via single-application remote command) triggered too early. Add a 'moduleLoaded()' signal to CoreEngine and trigger from there (due to lack of a proper "engine up/attached" notification. Emit moduleLoaded() from the first timed-out debug event handler when modules no longer change. Reviewed-by: Robert Loehning <email@example.com>