fixing maintaining selection index after item delection in cclip
fasttrack

Summary by cubic

Fixes selection behavior in cclip after reloads. If the selected item is deleted, we keep the same index; otherwise we restore by rowid and keep it in view.

• Bug Fixes
  • Restore selection by matching rowid when item still exists.
  • If deleted, keep previous index (clamped to last item) or clear when empty.
  • Adjust scroll_offset so the selection stays visible.

^{Written for commit 1b106ce. Summary will update on new commits.}