(svn r27591) [1.6] -Backport from trunk:

- Change: Performance improvement for dedicated servers by skipping drawing calls earlier in the process [FS#6402] (r27579)
- Fix: Vehicles could not be hidden from the purchase list when they were in exclusive preview [FS#6454] (r27578)
- Fix: Dock and roadstop picker, client list and town authority window did not auto-resize according to their content when they were positioned at the bottom of the screen [FS#6386] (r27577)
- Fix: Various incorrect but uncritical size computations in the content client [FS#6449] (r27576, r27570)

src/road_gui.cpp

@@ -1037,7 +1037,7 @@ struct BuildRoadStationWindow : public PickerWindowBase {
 		 * Never make the window smaller to avoid oscillating if the size change affects the acceptance.
 		 * (This is the case, if making the window bigger moves the mouse into the window.) */
 		if (top > bottom) {
-			ResizeWindow(this, 0, top - bottom);
+			ResizeWindow(this, 0, top - bottom, false);
 		}
 	}