v1.18.2 — Readable text on the .msi installer

Fixes black, unreadable text on the .msi installer's Welcome and Finish screens (they show our full branded dark background; the default WixUI text color was black). Now light and readable. See CHANGELOG.md for the technical detail. Verified by decompiling the actual built MSI to confirm the color values and dialog rename landed correctly — visual confirmation from Harvey's own install still appreciated.