Enable pointer interaction on the PC and app grid items

Limelight/UIAppView.m

@@ -61,6 +61,11 @@ static UIImage* noImage;
     // but we want it unrasterized for tvOS where it must be scaled.
     self.layer.shouldRasterize = YES;
     self.layer.rasterizationScale = [UIScreen mainScreen].scale;
+    
+    if (@available(iOS 13.4, *)) {
+        // Allow the button style to change when moused over
+        self.pointerInteractionEnabled = YES;
+    }
 #endif
     
     [self updateAppImage];

Limelight/UIComputerView.m

@@ -77,6 +77,11 @@ static const int LABEL_DY = 20;
 #else
     [self addSubview:_hostOverlay];
     [self addSubview:_hostSpinner];
+    
+    if (@available(iOS 13.4, *)) {
+        // Allow the button style to change when moused over
+        self.pointerInteractionEnabled = YES;
+    }
 #endif
     
     return self;