Add separators on context menu

[alexlazovic]

We could add the separators here to help the user scan more easily through the options. Also, if possible, push the "Delete" option to the bottom and make it red to clearly communicate a destructive operation.

[lipis]

We also have these ones:

[dwelle]

Looks good. Agreed on the delete.

[vjeux]

That looks great, thanks for helping out. If someone is interested in implementing this, that'd be awesome.

[dwelle]

Note for contributors, we'll likely want to finish this PR first: #2501

[Kartik1397]

Can I work on this?

[lipis]

Please do!

[kbariotis]

Go for it @Kartik1397, the main component for the context menu is this one and is being called primarily from the App like here.

[lipis]

@Kartik1397 If you're working on it.. create an early draft so we can test/review early if there are choices to be made :)