This commit add CComponentBox under text. If quest have components description height will be changed to avoid conflicts.
Though it's would be much better if VCMI had something like QScrollArea in Qt so both text and components was using shared slider.
- renamed CAdventureMapButton to more expectable CButton
- merged CButtonBase into CButton
- created more generic class for clickable elements
- created more generic class for selectable elements
- renamed CHighlightableButton to CToggleButton
- renamed CHighlightableButtonsGrous to CToggleGroup
- minimized differences between API of all these classes
- removed all but one contructors in buttons, with same parameters across all classes