Reduce screen and cursor flickering #193
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As the title says, this PR considerably reduces screen and cursor flickering.
Explanation: it avoids calling draw() for each byte in a key sequence, making a single call only once the sequence is complete. This way, we reduce the number of calls from 4-5 to just 1, which greatly improves responsiveness and reduces flickering.
Also, I added a few new tty functions to control the cursor visibility: it should be hidden while we're listing entries, and unhidden once we're done.
Hope this helps.