Perform FogObscures as late as possible

FogObscures is more expensive than simpler boolean, player or HasTraitInfo checks, so in these places it makes sense to perform the other checks first.

OpenRA.Mods.Common/Widgets/ViewportControllerWidget.cs

@@ -185,7 +185,7 @@ namespace OpenRA.Mods.Common.Widgets
 
 			var worldPixel = worldRenderer.Viewport.ViewToWorldPx(Viewport.LastMousePos);
 			var underCursor = world.ScreenMap.ActorsAt(worldPixel)
-				.Where(a => !world.FogObscures(a) && a.Info.HasTraitInfo<ITooltipInfo>())
+				.Where(a => a.Info.HasTraitInfo<ITooltipInfo>() && !world.FogObscures(a))
 				.WithHighestSelectionPriority(worldPixel);
 
 			if (underCursor != null)