Upgrade some icon

[louies0623]

Redesign some icons and reduce the capacity occupied by the icon size.

[louies0623]

@Hierosme
Could you please replace "os.path.dirname" directly with "os.path.join"? For example, this paragraph.
This
self.setPixmap(QtWidgets.QWizard.BackgroundPixmap, QtGui.QPixmap(os.path.dirname(__file__) + '/Welcome.png'))
to
self.setPixmap(QtWidgets.QWizard.BackgroundPixmap, QtGui.QPixmap(os.path.join (__file__) + '/Welcome.png'))

[louies0623]

@probonopd Most of the icons have been replaced. As for the modification of the code, I am sorry that I am not capable enough. You may need to modify it later.

[Hierosme]

@Hierosme Could you please replace "os.path.dirname" directly with "os.path.join"? For example, this paragraph. This self.setPixmap(QtWidgets.QWizard.BackgroundPixmap, QtGui.QPixmap(os.path.dirname(__file__) + '/Welcome.png')) to self.setPixmap(QtWidgets.QWizard.BackgroundPixmap, QtGui.QPixmap(os.path.join (__file__) + '/Welcome.png'))

If fact no:

os.path.join() join a list for create a cross platform path by determine the value of os.path.sep ( / or \)
od.path.dirname() is coupled with file_ get the true directory where is store the py file it self.

From my point the syntax should be

logo_pixmap = QtGui.QPixmap(
    os.path.join(
        os.path.dirname(__file__) ,
        'failed.png'
)).scaledToHeight(256, QtCore.Qt.SmoothTransformation)

[Hierosme]

Any news of it pull request ?
@louies0623 have make a huge work and a merge is require from my point.

The image path it not a trouble, i can open an other MR and fixe every pure style path trouble.
Pure style is not a issue, when it work it work ...

Regards