Add scrolling of dictionary / wikipedia popup window with keyboard keys

[mars4science]

Is your feature request related to a problem? Please describe. I cannot use arrows / pageUp Down keys to scroll dictionary window, using mouse/trackpad is much less convenient at times.

Describe the solution you'd like Keys work and scroll the view.

Describe alternatives you've considered

Additional context I've found the view is most likely GtkScrolledWindow from dictionaryBox.ui and to add this functionality maybe similar to below is needed: https://stackoverflow.com/questions/59281749/how-to-scroll-a-scrolledwindow-with-arrow-keys-in-gtk-3-24-5

[johnfactotum]

• It looks like you are using v2, which I am not maintaining anymore. v3 doesn't have this problem.
• Page up and page down are working for me even in v2.