In fact these icons should not be in the toolbar at all. But integrating
Cut/Copy/Paste into Qt Creator's ActionManager is too much for 4.2.
Change-Id: If9ec2f946dd1c500bb7d537d412a342aec929200
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
Some of the icons that came with the scxml editor were already present
elsewhere in Qt Creator in a themable/HighDPI-able form.
Remove the own .png files, use the existing icons.
Change-Id: I891305faee45eeb39dac4135d2ff96fc06727731
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>
