The bounding rectangle used to define the position of the terminal text
can be edited. The y position and height can now be edited. The width is
not editable because is always the width of the rectangle of the of the
terminal.
TerminalStripLayoutPattern class is now a shared pointer between all
terminal strip item.
QETProject have now a new class : ProjectPropertiesHandler
the goal of this class is to manage every kind of properties used in the
project, this class will be strongly used in future.
