No longer throw Error when MAX_REDRAWS count has been exceeded.

Throwing this error was introduced recently, but appears to have been unintentionally committed (since the error message isn't helpful/relevant, and because the unexpected Error will unnecessarily disrupt the display of the timeline if not caught).

lib/timeline/Core.js

@@ -614,8 +614,7 @@ Core.prototype.redraw = function() {
       this.redraw();
     }
     else {
-      console.log('WARNING: infinite loop in redraw?')
-      throw new Error("bla")
+      console.log('WARNING: infinite loop in redraw?');
     }
     this.redrawCount = 0;
   }