enable copying of text from figure titles and other text elements of a figure

This is a feature request. it seems that titles and texts from a figure cannot be copied by the user, at least when they are displayed in a standard browser such as Chrome. For various user workflows, it would be helpful to enable the copy of text fields from figures, which is enabled for almost any text displayed on the web (even without using a framework like Dash for display).

This will enable user flows where going back from plots to data entity names needs to happen without confusion, by copying entity names from titles inside figures being viewed.

Issue 中没有指出文件、测试或入口点。首先在 plotly.js 中找到图形文本的渲染路径，并在 Chrome 中复现该行为；当用户可以选择并复制标题及其他图形文本，同时不会破坏图形交互时，即表示完成。