Improve UI handling

[jjcarrier]

The following UI improvements should be addressed:

• Ensure the selected item remains on screen when toggling the controls menu
• Resize the UI to fit the vertical space when there is room to do so (there are edge cases where this does not happen).
• Improve UI performance in WSL. There appears to be significant slowdown compared to other environments.
• Prevent issue where UI moves upwards and even off the screen entirely during certain window resizing events.
• In rare cases, the (Windows) terminal has been observed to exit with exit code 259 during excessive window resizing tests.

[jjcarrier]

Resolved in #10 and #11; however, there appears to be a performance issue when used under WSL. I believe performance is normal when running on a native Linux system. Update original post to indicate this remaining issue.

[jjcarrier]

WSL performance issue appears to have been resolved via powershell updates (more testing may be required to fully verify, closing for now).