restore inventory and healthbar

* make inventory/healthbar work again allowing reload
* changes in top menu toggle buttons
* all modules are now reloadable by default
* fix warning when using fade in
* remove some unused files

modules/game_interface/gameinterface.otui

@@ -1,46 +0,0 @@
-GameSidePanel < UIMiniWindowContainer
-  image-source: images/sidepanel.png
-  image-border: 4
-
-GameBottomPanel < Panel
-  image-source: images/bottompanel.png
-  image-border: 4
-
-GameMapPanel < UIMap
-  padding: 4
-  image-source: images/mappanel.png
-  image-border: 4
-
-UIGame
-  id: gameRootPanel
-  anchors.fill: parent
-  anchors.top: topMenu.bottom
-
-  GameSidePanel
-    id: gameRightPanel
-    width: 190
-    layout: verticalBox
-    anchors.right: parent.right
-    anchors.top: parent.top
-    anchors.bottom: parent.bottom
-
-  GameBottomPanel
-    id: gameBottomPanel
-    height: 170
-    anchors.left: parent.left
-    anchors.right: gameRightPanel.left
-    anchors.bottom: parent.bottom
-
-  GameMapPanel
-    id: gameMapPanel
-    anchors.left: parent.left
-    anchors.right: gameRightPanel.left
-    anchors.top: parent.top
-    anchors.bottom: gameBottomPanel.top
-    focusable: false
-
-  UIWidget
-    id: mouseGrabber
-    focusable: false
-    visible: false
-