Some UX improvements
- Enable renaming of custom prompt in Edit Custom Prompt command modal #635
- Revert auto-scroll as it streams behavior to scroll to bottom only when streaming is done, avoid jittery auto-scrolling, and fix up and down arrow key navigation for some corner cases #632
- Fix a bug where cursor is not focused in chat input when Copilot Chat pane is toggled on #593
Welcome first-time contributor @Emt-lin