Merge cntdown_timer from https://github.com/0w0mewo/fpz_cntdown_timer

# Conflicts:
#	cntdown_timer/application.fam

cntdown_timer/application.fam

@@ -1,5 +1,3 @@
-# qv. https://github.com/flipperdevices/flipperzero-firmware/blob/dev/documentation/AppManifests.md
-
 App(
     appid="cntdown_tim",
     name="Count Down Timer",

cntdown_timer/views/countdown_view.c

@@ -223,7 +223,7 @@ static void handle_time_setting_updown(CountDownTimView* cdv, CountDownViewCmd c
             }
 
             if(count < 0) {
-                count = 0;
+                count = 1;
             }
 
             // update count state