Extendable Tooltip box system and easier to use combat window

Polishing the UI is still the focus for a few days more. The addition of tooltip box is finished. Till now the character creation dropdown lists for Races and Professions got tooltip texts. It's quite easy to extend the tooltip system to most of the UI elements later if needed.

Another new feature made in: a new set of checkboxes were added to the turn act window (combat), which are reflecting if the given character's choice for action is valid or not for the turn. That way the player is able to spot which character's previous action is not doable in the current round, making it easier to see what's left to be set before starting next combat round.