Instead of opening input dialog, replace status bar with input

[hyperrealgopher]

Instead of opening a popupbox screen/input dialog, just replace the bottom status bar with a prompt like "Enter goto #:" and then the actual input field.

Save the popup overlays for errors, I guess. Maybe some errors can go in status bar?

[hyperrealgopher]

This will be tricky...I think we can just do a one row high overlay of the bottom similarly to how popups were already working in the Popup.hs.

[hyperrealgopher]

this is where possibly standard ui becomes important... because i'll have to detect if popup isn't Nothing in state in order to render it before the rest in the [ui]...

[hyperrealgopher]

please see #37

[hyperrealgopher]

This error is ambiguous and could possibly be better suited to the CONTRIBUTING.md.