Yida Lin

@cbrnr Ready! Please let me know what do you think! :)

@cbrnr Hi Clemens, Ready, except 2 issues: * I don't know how to extract mouse wheel event from QKeySequence * I don't know how to enable it when not opening...

@cbrnr hmm `QAction`s are scattered everywhere... It would be difficult to include a bunch of headers just for the dialog. :/ Plus `GuiActionCommand::getQActions ()` is abstract... which makes it even...

@cbrnr Hi Clemens! :) All finished and ready to merge! Right before the Graz BCI Conference :)

@cbrnr Hi Clemens, Sure. I didn't realize they weren't resizable. Just fixed the problem.

@cbrnr Hi Clemens, Just made them resizable.

@cbrnr Removing doesn't work. That will cause the file unloadable because `libxdf` loads files by reading the length of each chunk indicated in the file. However, you can replace those...

@cbrnr Hmmmmm. Not sure whether this is necessary, since I sense this would involve some significant changes. However, if I were to do it, I would really wish to add...

@cbrnr Just saw in Eclipse there is a menu option: Open project in new window. Maybe we can emulate that in SigViewer

Let's reference to the description [here](http://doc.qt.io/qtinstallerframework/ifw-updates.html).