Respond to keyboard

[rnystrom]

Thinking about making the “new issue” UI on GitHawk use this menu, but atm the menu doesn’t respond to the keyboard showing. Imagine if you have a text box in the menu, it could get really easy to cover it up.

I was thinking we could provide a “keyboard handling” enemy with options none, stickToBottom, stickToTop, and fit. Give the caller a bit of control.

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[rnystrom]

Here’s an example from T3:

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