Feature Request: add GUI support for copying and pasting strings: wallet addresses, passwords and seeds

[hackneyb]

FEATURE REQUEST REPORT - originally wrongly filed here: NebulousLabs/Sia#2968

Current Behaviour
Only keyboard shortcuts work for copying and pasting text in the wallet GUI

Desired Behaviour
Support other means of copying and pasting text - easiest would be right-click support (either right-click to paste, or right-click to get a menu to copy/paste a la Windows Explorer context menu).

Many end users do not know the keyboard shortcuts to manipulate text.

How to reproduce it (as minimally and precisely as possible)
Latest wallet does not have the feature support.

Environment

• Sia version: 1.3.2
• OS: Windows Server 2012 R2 (and all others I assume)