Let use copy/paste email addresses

[Facyla]

Description

Let users select, copy and paste user content within the app, and especially into the email form fields.

Expected result

Being able to copy/paste a list of email addresses at once (bc it is especially useful if we have 20 email addresses to copy/paste). Both through click and select (mouse or touch), and also through the keyboard (Shift + arrows).

Current behavior

Mouse and keyboard select of text is not possible for emails in To, CC and CCI fields

also right-click doesn't let copy the email address individually either.

Preconditions (optional)

In general, being able to select any text elements besides interface elements is useful (email addresses first, but also email titles and content)

[dab246]

Same #2666