Windows should be shown using pushInt and closed with popInt or PopIntTotally (if interface needs to be also deleted).
Some things are not working yet properly, I'll try to fix them ASAP.
* dismiss Hero works blocked in the castles
* the backpack scrollable arrows aren't available (yellow, clickable) even when backpack is empty.
* added missing info texts for buttons in hero window (and added functionality of enable tactic formations button)
* can select (single click) and enter castle (double click) from the map. Same for hero.
* Hero gets automatically selected after End Turn
* Hero is automatically selected when exiting town
* In Garrison or Hero army: units are selected when we first click on them
Fixed (at least partially) also a problem with disappearing path
* if hero doesn't have a spell book, he can buy one in a mage guild
* improvements in closing
* fixed crash on picking artifact
* added event message when picking artifact
* fixed problems with disappearing pikemen
* InfoWindow will be properly centered
* hero portraits again visible in PreGame
* fixed problems with handling Pandora's Box
* support for Campfires
* minor changes
* randomizing spells in towns
* fixed reading forbidden structures
* support for heroes starting in town garrisons
* hopefully fixed problems with wrong town defs (village/fort/capitol)
* moved CSpellHandler.* to VCMI_Lib (project files must be updated)
* redone reading spell info
* added missing features to the fort screen
* minor improvements
* partially done mage guild screen
