As a budget planner, I want to have key bindings available, so that I can quickly trigger frequently required actions on the UI.

Key bindings have been introduced in 83a7ce99 but require revision and further work for becoming usable.

Acceptance criteria

• A set of key bindings for important actions exist
• The key bindings are documented in the app

Tasks

• review key combinations used and consider if more actions should be implemented
• provide helper tips on the triggered buttons in the UI
• document key bindings