proposed fix 1502 incorrect slash in windows

[curlymorphic]

proposed fix for issue #1502 Wrong slash in windows

This fix simply uses Qt's QDir::toNativeSeparators for the display values in the settings dialog.
The stored file paths remain untouched, I feel this is safest, from what i have read Qt automatically converts when accessing files.

@Sti2nd @StakeoutPunch @Umcaruje or @SecondFlight

Can you please test this on windows?

[Umcaruje]

I'll make a build for testing this :)

[curlymorphic]

@Umcaruje thanks

[tresf]

@curlymorphic very elegant! Thanks! @Umcaruje thanks as well.

[Umcaruje]

Here is a win64 version: https://drive.google.com/file/d/0B49dcRGtm8vJZk1QVXZlQjFNblE/view?usp=sharing

Will install and test in a moment.

[tresf]

Looking pretty good... that extra slash on STK is erroneous but probably exists elsewhere in the code (or leftover from the old config)

[Umcaruje]

Yup, fixed :

[badosu]

@curlymorphic Good one! :-)