Context menu on the TextEdit widget

[mexus]

Is your feature request related to a problem? Please describe.
It is a bit inconvenient that we do not have the ability to use a context menu for standard operations such as cut/copy/paste/select all/etc.

Describe the solution you'd like
Some way to add a context menu to the TextEdit widget without loosing the text selection information.

Describe alternatives you've considered
At first, I tried to go with a straightforward solution of calling a "context_menu" on the "Response" returned by the "TextEdit::ui", but it didn't work at all. No context menu on the right click appeared.

Then, I added the "context_menu" to the outer widget ("CentralPanel") and noticed that the context menu appears almost everywhere, but not on the TextEdit.

I ended up inspecting the "output.response.clicked_by(egui::PointerButton::Secondary)" property to find out that the "output.cursor_range" doesn't contain the actual selection. So, unfortunately, I can't use this workaround.

Additional context

Actually all I need is just a "copy" button that appears near the selected text which copies the selected text, so there might probably an easier solution than implementing a full-fledged context menu for the widget.

Thanks!!