Xiaobo Liu
992d36b6b0
When shift is held during a single click, extend the existing selection from its anchor point to the clicked position instead of starting a new selection. Self-Review Checklist: - [x] I've reviewed my own diff for quality, security, and reliability - [x] Unsafe blocks (if any) have justifying comments - [x] The content is consistent with the [UI/UX checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist) - [x] Tests cover the new/changed behavior - [x] Performance impact has been considered and is acceptable Release Notes: - Added markdown support shift+click to extend text selection