[WIP] Improved UX for switching modpack versions

[aervxa]

Not tested yet

Probable problems:
.download-cell on the header cell influencing button with text
ExternalIcon is not be the best fit for navigating to modpack's version page (icon for "link" or "changelog"?)

[aervxa]

Tested. works as intended.

drawbacks as of rn:

• removed text from switch button (it gets too wide and breaks visual "harmony" lol), so .download-cell is not a worry anymore
• same icon problem
• clicking on the item does nothing, users will have to either click the switch icon (which is unclear) or the external icon to go to the version page

my ideas:

• make clicking the item do the same as the switch button
• solve icon problem by using a standard "link" icon
• give a little padding to the link button on the right (hovering on scrollbar makes it touch the buttons)

I'd love to hear yalls take on this :>