Quality Assurance/VisualEditor regression test backlog

Additional bugs suggested by Rummana that might not be appropriate for automated regression testing:
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=59171
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=59154
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=59092
 * https://bugzilla.wikimedia.org/show_bug.cgi?id=59004