Smit Barmase
6a8fdbfd62
Closes #31648 This PR adds support for: - Expanding multiple cursors above/below - Expanding multiple selections above/below - Adding new cursors/selections when expansion has already been done. Existing expansions preserve their state and expand/shrink according to the action, while new cursors/selections act like freshly created ones. Tests for both cursor and selections: - below/above cases - undo/redo cases - adding new cursors/selections with existing expansion Before/After: https://github.com/user-attachments/assets/d2fd556b-8972-4719-bd86-e633d42a1aa3 Release Notes: - Improved `AddSelectionAbove` and `AddSelectionBelow` to extend multiple cursors/selections.