* Fix missing "Vista style" in static, Qt 5.10 based
Windows build
* Required since the platform styles have been
"pluginized" in Qt 5.10
* See 4f3249f32d
* Only link targets using static Qt Gui/Widgets/Quick
against static plugins since currently only GUI-related
plugins are relevant
* Don't require to link explicitely against the related
module (eg. Qt Svg for the Svg icon engine) because the
imported target of the plugin should pull all required
dependencies
* Add option for linking against static Qt image format
plugins
* Link GUI applications using static Qt Gui/Widgets/Quick
against the static X11 platform integration plugin if it
is available