Support device selection dialogue box

[luckpi]

If no chip name is given, then we will use the SelectDialog.

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[hkpeprah]

Thanks for the contribution! Could you give an example of the use-case for this? My assumption is that users who want to allow selection from all available chips would use the supported_device() and num_supported_devices() to build their own UI. E.g.

num_devices = jl.num_supported_devices()
devices = list(jl.supported_device(i) for i in range(num_devices))

# Use `devices` to show custom UI, or for terminal completion.

[luckpi]

Through JLINK_ARM_DEVICE_SelectDialog(), device selection can be achieved without additional code

[hkpeprah]

Sorry, I should have elaborated bit more. I'm trying to think of a use case where a developer would want the SDK's GUI to pop up from their Python script. The GUI isn't available in all versions of the SDK or on all platforms, so calling it could fail in a way that isn't intuitive to the caller in a way in which not specifying the device is. Similarly, if the caller accidentally forgets to pass a device on a server without X11 forwarding, their process would stall AFAIK. So the user of the embedded GUI is non-universal.

I think if a user is building something that allows for the end user to select from a variety of devices, they would have their own UI already in order to do the various non-target specific things.