Replace the single-line, semicolon-separated keyword field with a taller
multi-line edit box (with a vertical scrollbar) where each keyword goes on
its own line. The stored format stays semicolon-separated, so existing
notify.ini files remain valid; load/save convert between newlines and
semicolons, trimming each keyword and skipping empty lines.
Also decode the stored matchPattern as UTF-8 when loading the dialog, so
non-ASCII keywords round-trip correctly (matching the CP_UTF8 encoding
used on save).
Co-Authored-By: deepseek-v4-pro
