restore old modules

* partially restore vip, battle, healthbar, skills and inventory modules
* more fixes on UIWidgets
* implement UIMiniWindow close/minimize functionality
* allow drag and drop miniwindows beteween game panels

modules/game_inventory/inventory.lua

@@ -1,6 +1,7 @@
 Inventory = {}
 
 -- private variables
+local inventoryWindow
 local inventoryPanel
 local inventoryButton
 
@@ -13,7 +14,9 @@ function Inventory.init()
 
   Keyboard.bindKeyDown('Ctrl+I', Inventory.toggle)
 
-  inventoryPanel = displayUI('inventory.otui', GameInterface.getRightPanel()):getChildById('inventoryPanel')
+  inventoryWindow = displayUI('inventory.otui', GameInterface.getRightPanel())
+  inventoryWindow.onClose = Inventory.toggle
+  inventoryPanel = inventoryWindow:getChildById('contentsPanel')
   inventoryButton = TopMenu.addGameToggleButton('inventoryButton', 'Inventory (Ctrl+I)', 'inventory.png', Inventory.toggle)
   inventoryButton:setOn(true)
 
@@ -30,15 +33,16 @@ function Inventory.terminate()
 
   Keyboard.unbindKeyDown('Ctrl+I')
 
-  inventoryPanel:destroy()
-  inventoryPanel = nil
+  inventoryWindow:destroy()
   inventoryButton:destroy()
+  inventoryWindow = nil
   inventoryButton = nil
+  inventoryPanel = nil
 end
 
 function Inventory.toggle()
-  local visible = not inventoryPanel:isExplicitlyVisible()
-  inventoryPanel:setVisible(visible)
+  local visible = not inventoryWindow:isExplicitlyVisible()
+  inventoryWindow:setVisible(visible)
   inventoryButton:setOn(visible)
 end
 

modules/game_inventory/inventory.otui

@@ -2,12 +2,10 @@ MiniWindow
   id: inventoryMiniWindow
   text: Inventory
   icon: inventory.png
-  width: 192
-  height: 154
+  height: 180
+  @onClose: Inventory.toggle()
 
   MiniWindowContents
-    id: inventoryPanel
-
     Item
       // head
       id: slot1
@@ -37,7 +35,6 @@ MiniWindow
       anchors.top: prev.bottom
       anchors.horizontalCenter: prev.horizontalCenter
       margin-top: 5
-      margin-bottom: 10
       &position: {x=65535, y=8, z=0}
 
     Item