Add commands to give feedback

[Kittyfisto]

• [x] Add command to help menu to give feedback
• [x] Add command to report a problem, opening the default web-browser and landing on the "new issue" page
• [x] Add command to ask a question, opening the default web-browser and landing on the "new discussions" page
• [x] Add command to suggest a feature, opening the default web-browser and landing on the "new discussions" page