style adjustment and fixes

* style adjustments, now window and button style
* fix bug when logging on a tile with too many creatures
* remove deprecated onLogin and onLogout events

modules/game/styles/miniwindow.otui

@@ -8,7 +8,6 @@ MiniWindow < UIMiniWindow
   image-source: /game/images/miniwindow.png
   image-border: 4
   image-border-top: 23
-  image-border-left: 23
   image-border-bottom: 4
   focusable: false
   &minimizedHeight: 24