move editor window title logic to base class

[lshman]

Each editor has its own (slightly different) logic for setting the window title.
I have moved the logic to the base class (EditViewBase) so the window titles should be consistent.

[tedfelix]

Originally I wasn't referring to the window title. @MatrixWidget::m_segmentLabel@ is a label that appears below the matrix editor and shows both the Segment name and color for quick identification when spinning through Segments with the wheel control. We need that added to NotationWidget.

I'll take a look at this window title change when I have a chance, though.

[lshman]

Oh right. I read your original remark and it is actually quite clear. I don't know why I interpreted it as the window title. Still I think the window titles are more consistent now. I can try to look at the label. It is certainly a useful feature in the matrix editor !

[tedfelix]

This branch was merged on sourceforge.