Make MMMStackContainer pass taps through, just like other containers

This is handy when these containers are used within floating headers/footers,
where we want to be able to scroll by dragging the header/footer itself, while
there still can be other tappable elements, so disabling user interactions for
the whole header/footer is not feasible.

MMMCommonUI.podspec

@@ -6,7 +6,7 @@
 Pod::Spec.new do |s|
 
 	s.name = "MMMCommonUI"
-	s.version = "3.11.0"
+	s.version = "3.11.1"
 	s.summary = "Small UI-related pieces reused in many components from MMMTemple"
 	s.description =	"#{s.summary}."
 	s.homepage = "https://github.com/mediamonks/#{s.name}"

Sources/MMMCommonUIObjC/MMMLayout.m

@@ -1161,6 +1161,16 @@ - (void)setSubviews:(NSArray<UIView *> *)subviews {
 	}
 }
 
+// Just like other containers, this should be passing taps through.
+- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
+	UIView *view = [super hitTest:point withEvent:event];
+	if (view == self) {
+		return nil;
+	} else {
+		return view;
+	}
+}
+
 @end
 
 //