v5.1.0

Essentially fixed everything that I could find that wasn't styled correctly and made some executive decisions as to the colour of various interactables. For the sake of simplicity, I overwrote most colours using the .theme-dark class, so specifically selecting the Ash default theme is necessary for this theme to work as intended. The colours of various interactables can be changed by changing --primary-colour, --secondary-colour, and --tertiary-colour.