Linux: Fix window positioning on HiDPI screens

In 6f3fb5a29f windowBorder member of
LinuxComponentPeer was changed to mean the logical size of the border
that is independent of the current scale factor. This was done to fix a
bug and make it consistent with the bounds member, which is also
independent from the scale factor.

This change wasn't taken into account in XWindowSystem::setBounds()
causing a positioning bug.

modules/juce_gui_basics/native/x11/juce_linux_XWindowSystem.cpp

@@ -1747,17 +1747,17 @@ void XWindowSystem::setBounds (::Window windowH, Rectangle<int> newBounds, bool
             X11Symbols::getInstance()->xSetWMNormalHints (display, windowH, hints.get());
         }
 
-        const auto windowBorder = [&]() -> BorderSize<int>
+        const auto nativeWindowBorder = [&]() -> BorderSize<int>
         {
             if (const auto& frameSize = peer->getFrameSizeIfPresent())
-                return *frameSize;
+                return frameSize->multipliedBy (peer->getPlatformScaleFactor());
 
             return {};
         }();
 
         X11Symbols::getInstance()->xMoveResizeWindow (display, windowH,
-                                                      newBounds.getX() - windowBorder.getLeft(),
-                                                      newBounds.getY() - windowBorder.getTop(),
+                                                      newBounds.getX() - nativeWindowBorder.getLeft(),
+                                                      newBounds.getY() - nativeWindowBorder.getTop(),
                                                       (unsigned int) newBounds.getWidth(),
                                                       (unsigned int) newBounds.getHeight());
     }