ui: scroll to code snippet containing clicked edge

This change scrolls animated to the snippet representing the clicked edge instead of showing only this code snippet.

src/lib/component/view/CodeView.h

@@ -43,6 +43,8 @@ public:
 	virtual void showCodeSnippets(const std::vector<CodeSnippetParams>& snippets) = 0;
 	virtual void showCodeFile(const CodeSnippetParams& params) = 0;
 
+	virtual void scrollToFirstActiveSnippet() = 0;
+
 	virtual void focusToken(const Id tokenId) = 0;
 	virtual void defocusToken() = 0;