FIX: render markdown headers with levels 4-6 in addition to 1-3
NEW: log changes for and bump version to v0.18.1
NEW: log changes for and bump version to v0.18.0
NEW: bump version to and log changes for v0.17.1
NEW: log changs for and bump version to 0.17.0
NEW: bump version to v0.16.0
FIX: fix missing translations in frequency dialog
NEW: log changes for and bump version to v0.15.0
NEW: log changes for and bump version to 0.14.0
NEW: bump version to and log changes for v0.13.1