Porting the codebase to QT 5 (5.2) to get the
latest bug fixes, performance and improved platform
support.
This first part is to fixup the codebase to compile
on Qt 5, but some aspects have been broken (video).
The second part is to migrate from Qwt 6.0.1 to the
latest Qwt for multiaxis support.
The third part will be to fixup any platform specific
issues or issues identified at runtime.
.. you can now choose to remove reference lines in the
allplot when you double click on the axis.
.. we might want to put the table and buttons for deleting
references into the chart settings too (?)
So you can unzoom in ride plot when you've zoomed in
to an interval -- avoiding having to show fullplot to
do the same thing manually.
There are probably other places to add functionality
for zooming out, will deal with those as they arise.
