Correct corner radius of popups to match inner rounded things

Common/UI/PopupScreens.cpp

@@ -189,6 +189,7 @@ void PopupScreen::CreateViews() {
 	root_->Add(box_);
 	box_->SetBG(dc.GetTheme().popupStyle.background);
 	box_->SetHasDropShadow(hasDropShadow_);
+	box_->SetRadiusFactor(1.44f);
 	// Since we scale a bit, make the dropshadow bleed past the edges.
 	box_->SetDropShadowExpand(std::max(g_display.dp_xres, g_display.dp_yres));
 	box_->SetSpacing(0.0f);

Common/UI/ViewGroup.cpp

@@ -188,7 +188,8 @@ void ViewGroup::Draw(UIContext &dc) {
 	}
 
 	if (roundCorners_ != RoundCorners::None) {
-		dc.FillRoundRect(bg_, bounds_, dc.GetTheme().choiceRoundRadius, roundCorners_);
+		// Surrounding round rects (like windows) need a bigger radius to look right.
+		dc.FillRoundRect(bg_, bounds_, dc.GetTheme().choiceRoundRadius * radiusFactor_, roundCorners_);
 	} else {
 		dc.FillRect(bg_, bounds_);
 	}

Common/UI/ViewGroup.h

@@ -100,6 +100,7 @@ public:
 	void SetDropShadowExpand(float s) { dropShadowExpand_ = s; }
 	void SetExclusiveTouch(bool exclusive) { exclusiveTouch_ = exclusive; }
 	void SetClickableBackground(bool clickableBackground) { clickableBackground_ = clickableBackground; }
+	void SetRadiusFactor(float factor) { radiusFactor_ = factor; }
 
 	void SetClip(bool clip) { clip_ = clip; }
 	std::string DescribeLog() const override { return "ViewGroup: " + View::DescribeLog(); }
@@ -107,6 +108,7 @@ public:
 
 	void Recurse(std::function<void(View *)> func) override;
 
+
 protected:
 	std::string DescribeListUnordered(std::string_view heading) const;
 	std::string DescribeListOrdered(std::string_view heading) const;
@@ -118,6 +120,7 @@ protected:
 	View *defaultFocusView_ = nullptr;
 	Drawable bg_;
 	float dropShadowExpand_ = 0.0f;
+	float radiusFactor_ = 1.0f;
 	bool hasDropShadow_ = false;
 	bool clickableBackground_ = false;
 	bool clip_ = false;