fix(KB-183): prevent dep-dropdown clicks from cancelling InlineCreateCard

- Add onMouseDown preventDefault on dep-dropdown and items to retain focus
- Extend focusout guard to check dependencies and showDeps state before cancelling
- Update useEffect dependency array to include dependencies and showDeps
- Add tests for mouseDown preventDefault and no-cancel with selected deps
- Add changeset for the patch fix

.changeset/fix-inline-create-dep-cancel.md

@@ -0,0 +1,5 @@
+---
+"@dustinbyrne/kb": patch
+---
+
+Fix InlineCreateCard cancelling when clicking dependency dropdown items with empty description.