Fix crash when hasPlayed condition refers to non-existing message

hugvey/story.py

@@ -467,6 +467,7 @@ class Condition(object):
         msg = story.get(self.vars['msgId'])
         if not msg:
             story.logger.critical(f"Condition on non-existing message: {self.vars['msgId']}")
+            return False
 
         #: :type msg: Message
         r = msg.isFinished()

www/js/hugvey_console.js

@@ -1041,8 +1041,8 @@ class Graph {
 				crel('input', {
 					'type': 'number',
 					'min': 1,
-//					'max': 5,
-					'step': .1,
+					'max': 92,
+					'step': 1,
 					'on': {
 						'change': function(e){
 							panopticon.graph.configuration['light0_fade'] = e.target.value