Store and display played time on character Stats tab

Save totalTimePlayed/levelTimePlayed from SMSG_PLAYED_TIME. Request a
fresh update whenever the character screen is opened. Show total and
level-played time in a two-column layout below the stats panel.

src/game/game_handler.cpp

@@ -18149,6 +18149,9 @@ void GameHandler::handlePlayedTime(network::Packet& packet) {
         return;
     }
 
+    totalTimePlayed_ = data.totalTimePlayed;
+    levelTimePlayed_ = data.levelTimePlayed;
+
     if (data.triggerMessage) {
         // Format total time played
         uint32_t totalDays = data.totalTimePlayed / 86400;