more reasonable docking behavior

* left & right panels grab the whole window height
* top & bottom panels have the same width as input editor & result window
* it's more reasonable the lists take full height (more items visible) and especially expected behavior for dockable bitfield widget (and other widget i'm working on) 
* also enables nesting panels (more docks side by side on the same side) - more freedom for user and again will be good for bitfield and other similar widgets
* .ini or Layout\State setting must be deleted (otherwise new docking style will not be activated by Qt and strange things can happen)

![sc-docking](https://cloud.githubusercontent.com/assets/589865/5098462/d6a988fc-6f86-11e4-88b0-e90431b23d2c.png)