per effect smoothing (#456)

* add dynamic smoothing first step
* extend prio muxer to hold smoothing preset id
* add icons for systray
* fix missing changes in prio muxer
*  implement specific smoothing params for effects
* refactoring: std::min/max to qMin/Max
* some code optimization
* fix schema and translation
* revoke change of python include order
* fix eol in effect shemas
* optimize random,candle and fadecandy json schemas

effects/random.json

@@ -4,6 +4,11 @@
 	"args"   :
 	{
 		"speed"      : 750,
-		"saturation" : 1.0
+		"saturation" : 1.0,
+		"smoothing-custom-settings" : true,
+		"smoothing-time_ms" : 200,
+		"smoothing-updateDelay" : 0,
+		"smoothing-updateFrequency" : 20.0,
+		"smoothing-pause" : false
 	}
 }