Add scroll area to Enumerator example
Add scroll area to Enumerator example

When a system has many serial ports, the last of them are
not visible on the screen, because a widget has a big height.
So, it is reasonable to add scrolling of all serial ports info.

Change-Id: Ic13b58fba38a17d6f5142476bca501a0d26ec76d
Reviewed-by: Denis Shienkov <6a9c747bd2ba446682324cf340d3b86f30cf4d55@gmail.com>

RoadWorksSoftware/QtSerialPort-OS2,RoadWorksSoftware/QtSerialPort-OS2