Spam config toasts less often: trigger count 3->5.

some local testing showed that three config-key hits result
in a somewhat-spammy behaviour.
A moderate raising of the trigger limit makes it far less
likely to trigger the toast "by accident", and still
gives it relatively quickly when "seeking" it.

app/src/main/java/com/nicobrailo/pianoli/TooltipReminder.java

@@ -25,7 +25,7 @@ public class TooltipReminder {
      *
      * @see #COUNTING_WINDOW
      */
-    public static final int TRIGGER_COUNT = 3;
+    public static final int TRIGGER_COUNT = 5;
     /**
      * Start of currently running tooltip reminder time window (epoch millis).
      *