Minimap, hotkeys and lot of other changes

* Begin working on a new layout system for UIMinimap and later UIMap,
this new layout system allows to add widgets to the minimap
* Add option to disable motd
* Rework hotkey binding
* Lots of fixes in hotkeys manager
* Add fullmap view using Ctrl+Shift+M
* Prevent some crashs in ThingType draw
* Add function to load minimap from PNG files
* Fixes in minimap saving
* Fixes in Tile::isClickable
* Add UIMapAnchorLayout, new layout for maps
* Fix freezes in win32 when pressing alt key

modules/client_entergame/characterlist.lua

@@ -111,7 +111,7 @@ end
 
 function onGameConnectionError(message, code)
   CharacterList.destroyLoadBox()
-  errorBox = displayErrorBox(tr("Login Error"), message)
+  errorBox = displayErrorBox(tr("Connection Error"), message)
   errorBox.onOk = function()
     errorBox = nil
     CharacterList.showAgain()