[FL-2254] IR: fix hardfault, correct remote loading (#999)

* Bugfix: remove freeing of uninitialized object (IrdaAppSignal).
Therefore rubbish in memory sometimes caused HardFault.
* Fix: slow FFF makes IR-remotes loading take much time,
so we can glimpse previous scene's view while remote is parsing.
Reproducing: remove remote, fast press back (while popup is playing)
and select new remote - previous popup view is displayed.

applications/irda/irda_app_signal.cpp

@@ -70,8 +70,6 @@ IrdaAppSignal::IrdaAppSignal(const IrdaAppSignal& other) {
 }
 
 IrdaAppSignal::IrdaAppSignal(IrdaAppSignal&& other) {
-    clear_timings();
-
     raw_signal = other.raw_signal;
     if(!raw_signal) {
         payload.message = other.payload.message;