This patch removes the QToolBox from commit e93970 and replaces it with
a QComboBox instead. A new object ViewSelection can be included in any
new views and will manage the interaction with MainWindow to switch
between views. It is essentially a QComboBox with some code to interact
with MainWindow.
A new signal viewChanged(int) has been implemented in MainWindow to
notify of a view change. The parameter will be set to VIEW_ANALYSIS
or VIEW_TRAIN depending upon which view was selected.
In addition, a new TrainWindow object has been created which implements
the Realtime code and is comprised of the TrainTool and TrainTabs
implemented in e93970. It also sets its splitters from remembered values
in the same fashion as the central splitter on the Analysis view.
