feat(ui): Popups (#91)

Fixed sorting and added popups for trickend and roundend

Co-authored-by: LQ63 <lkhermann@web.de>
Reviewed-on: #91

knockoutwhistweb/app/util/mapper/RoundEndEventMapper.scala

@@ -0,0 +1,20 @@
+package util.mapper
+
+import controllers.routes
+import de.knockoutwhist.events.global.RoundEndEvent
+import model.sessions.UserSession
+import play.api.libs.json.{JsObject, Json}
+
+object RoundEndEventMapper extends SimpleEventMapper[RoundEndEvent] {
+
+  override def id: String = "RoundEndEvent"
+
+  override def toJson(event: RoundEndEvent, session: UserSession): JsObject = {
+
+    Json.obj(
+      "player" -> event.winner.name,
+      "tricks" -> event.amountOfTricks
+    )
+  }
+
+}