Move custom theming from settings to style-switcher, remove usage of custom .css files, use styles.json instead.

Update theme editor to have 4 colors, rewrite the color setter, change a LOT of base16 assignments for better consistency.

Also fetch user if not in the state already.

Give tall notifications either a scrollbar (mentions), or just cap them and use a cool hider (fav/rt).

Move previews from conversation to status, put the reply preview arrow back on timeline statuses, add a spinner when the preview is still loading.

Add an option to automatically show new posts when scrolled to the top, also add fade-in animation for posts.

notifications support (doesn't work for native KDE notifications for me tho)

Thanks, Aemon!