Bug: Arrow key keybinds still change time when other inputs are being used

[ShrimpCryptid]

Description

Split out from #98.

• The left/right arrow keys are currently mapped so they advance the current timestamp.
• When selecting/editing text in input boxes (or on range sliders, etc.), pressing the left or right arrow keys causes the current timestamp to also advance or reverse.

Expected Behavior

• Time should not be affected when other inputs are focused. Add a listener to check for the currently focused item...?

List of inputs that should override time keybinding behavior:

• Number and string inputs
• Sliders

Reproduction

A minimal example that exhibits the behavior.

Environment

Any additional information about your environment. E.g. OS version, python version, browser etc.